Timeline

February

 * February 4: Rumours is released.

September

 * September 13: The Dreaming is released.

September

 * September 16: Hounds of Love is released.

February

 * February 4: Control is released.

July

 * July 5: Debut is released.

June

 * June 13: Post is released.

October

 * October 3: Daydream is released.

September

 * September 16: Butterfly is released.
 * September 22: Homogenic is released.

January

 * January 12: ...Baby One More Time is released.

August

 * August 24: Christina Aguilera is released.

May

 * May 16: Oops!... I Did It Again is released.

August

 * August 14: The Spirit Room is released.
 * August 27: Vespertine is released.

October

 * October 1: Fever is released.

November

 * November 6: Britney is released.

June

 * June 4: Let Go is released.

October

 * October 29: Stripped is released.

December

 * December 10: 200 km/h In the Wrong Lane is released.

January

 * January 13: Deep Cuts is released.

March

 * March 4: Fallen is released.

June

 * June 17: Dangerously In Love is released.

November

 * November 12: In the Zone is released.

May

 * May 19: Under My Skin is released.

August

 * August 30: Medulla is released.

November

 * November 12: Love. Angel. Music. Baby. is released.
 * November 30: Breakaway is released.

July

 * July 18: Speak for Yourself is released.

August

 * August 29: Music of the Sun is released.

September

 * September 27: A Fever You Can't Sweat Out is released.

November

 * November 15: Confessions on a Dance Floor & The Yellow Album are released.

February

 * February 21: Everytime We Touch is released.

April

 * April 4: I'm Not Dead is released.
 * April 10: A Girl Like Me is released.

June

 * June 6: Loose is released.

August

 * August 9: Back to Basics is released.

September

 * September 4: B'Day is released.
 * September 13: The Dutchess is released.

October

 * October 24: Taylor Swift is released.
 * October 26: Back to Black is released.

December 1

 * December 1: The Sweet Escape is released.

February

 * February 6: Headstrong is released.

April

 * April 17: The Best Damn Thing is released.

May

 * May 1: Volta is released.
 * May 21: Trip the Light Fantastic is released.

June

 * June 12: Riot! is released.
 * June 22: My December is released.

July

 * July 10: Insomniatic is released.

October

 * October 11: Overpowered is released.
 * October 25: Blackout is released.

January

 * January 28: 19 is released.

March

 * March 21: Pretty. Odd. is released.

June

 * June 2: Good Girl Gone Bad: Reloaded is released.
 * June 17: One of the Boys is released.

August

 * August 19: The Fame is released.

September

 * September 23: Don't Forget is released.

October

 * October 24: Funhouse is released.

November

 * November 11: Fearless is released.
 * November 12: I Am... Sasha Fierce is released.
 * November 28: Circus is released.

January

 * January 12: Fever Ray is released.

March

 * March 6: All I Ever Wanted is released.

June

 * June 11: Guilty Pleasure is released.

July

 * July 3: Evacuate the Dancefloor & Lungs are released.
 * July 21: Here We Go Again is released.

September

 * September 29: Brand New Eyes & Kiss & Tell are released.

November

 * November 18: The Fame Monster is released.
 * November 20: Rated R is released.

January

 * January 1: Animal is released.

February

 * February 15: The Family Jewels is released.

April

 * April 23: Crystal Castles II is released.
 * April 27: Sparks Fly is released.

May

 * May 18: The ArchAndroid is released.

June

 * June 4: Bionic is released.
 * June 18: Can't Be Tamed & We Are Born are released.
 * June 30: Aphrodite is released.

August

 * August 24: Teenage Dream is released.

September

 * September 21: A Year Without Rain is released.

October

 * October 25: Speak Now is released.

November

 * November 12: Loud is released.
 * November 19: Cannibal is released.
 * November 22: Body Talk is released.
 * November 29: Bright Lights is released.

January

 * January 24: 21 is released.

March

 * March 2: Goodbye Lullaby is released.
 * March 22: Vices & Virtues is released.
 * March 25: Femme Fatale is released.

May

 * May 23: Born This Way is released.

June

 * June 14: Tug of War is released.
 * June 21: When the Sun Goes Down is released.
 * June 24: 4 is released.

September

 * September 20: Unbroken is released.
 * September 23: Cinderella's Eyes is released.

October

 * October 21: Stronger is released.
 * October 28: Ceremonials is released.

November

 * November 18: Talk That Talk is released.

January

 * January 27: Born to Die is released.

April

 * April 27: Electra Heart is released.

June

 * June 18: The Idler Wheel... is released.

September

 * September 4: Night Visions is released.
 * September 14: Kiss is released.

October

 * October 22: Hello My Name Is... & Red are released.

November

 * November 9: Lotus & Paradise are released.
 * November 19: Unapologetic is released.
 * November 30: Warrior is released.

March

 * March 19: Same Trailer Different Park is released.

April

 * April 5: Paramore is released.
 * April 12: True Romance is released.

May

 * May 10: Demi is released.

June

 * June 14: Studio Killers is released.

July

 * July 19: Stars Dance is released.

August

 * August 23: Halcyon Days is released.

September

 * September 3: Trouble & Yours Truly are released.
 * September 20: The Bones of What You Believe is released.
 * September 27: Pure Heroine is released.

October

 * October 4: Bangerz is released.
 * October 8: Too Weird to Live, Too Rare to Die! is released.
 * October 18: Prism is released.
 * October 29: Night Time, My Time is released.

November

 * November 1: Avril Lavigne is released.
 * November 6: Artpop is released.
 * November 29: Britney Jean is released.

December

 * December 13: Beyoncé is released.

June

 * June 13: Ultraviolence is released.

July

 * July 4: 1000 Form of Fear is released.

August

 * August 6: LP1 is released.
 * August 25: My Everything is released.

September

 * September 4: Goddess is released.
 * September 24: Queen of the Clouds is released.

October

 * October 1: 1 is released.
 * October 27: 1989 & Room 93 are released.

December

 * December 15: Sucker is released.

March

 * March 13: Froot is released.

April

 * April 7: CollXtion I is released.

May

 * May 12: I Don't Wanna Grow Up is released.
 * May 29: How Big, How Blue, How Beautiful is released.

June

 * June 24: Emotion is released.
 * June 30: Bombastic is released.

August

 * August 13: M3LL155X is released.
 * August 14: Cry Baby is released.
 * August 28: Badlands is released.

September

 * September 18: Honeymoon is released.
 * September 25: Every Open Eye is released.

October

 * October 9: For You & Revival are released.
 * October 16: Confident is released.

November

 * November 6: Art Angels, Delirium, & Get Weird are released.
 * November 20: 25 is released.

January

 * January 15: Death of a Bachelor is released.
 * January 28: Anti is released.

February

 * February 26: Vroom Vroom is released.

April

 * April 23: Lemonade is released.

May

 * May 20: Dangerous Woman is released.

August

 * August 5: Endless Summer is released.
 * August 26: Emotion: Side B & Glory are released.

September

 * September 30: The Altar is released.

October

 * October 7: Coconut Oil is released.
 * October 14: Evolution is released.
 * October 21: Bonito Generation & Joanne are released.
 * October 28: Lady Wood is released.

November

 * November 16: Nemesis is released.
 * November 18: Glory Days is released.

February

 * February 17: All Your Fault: Pt. 1 & Now That the Light is Fading are released.

March

 * March 10: Number 1 Angel is released.
 * March 17: So Good is released.

May

 * May 12: After Laughter is released.

June

 * June 2: Dua Lipa & Hopeless Fountain Kingdom are released.
 * June 9: CollXtion II, Ctrl & Witness are released.
 * June 16: Melodrama is released.

July

 * July 21: Lust for Life is released.

August

 * August 11: All Your Fault: Pt. 2, Don't Smile at Me & Rainbow are released.

September

 * September 21: Mix & Match is released.
 * September 22: Stranger In the Alps is released.
 * September 29: Tell Me You Love Me & Younger Now are released.

October

 * October 6: Take Me Apart is released.
 * October 13: Beautiful Trauma is released.
 * October 27: Rina is released.
 * October 31: Max & Match is released.

November

 * November 10: Reputation is released.
 * November 17: Blue Lips is released.

December

 * December 15: Pop 2 is released.

January

 * January 12: Camila is released.

March

 * March 30: Expectations & Golden Hour are released.

April

 * April 27: Dirty Computer & Speak Your Mind are released.

May

 * May 18: Saved is released.
 * May 25: Love is Dead is released.

June

 * June 15: Liberation is released.
 * June 22: Expectations & Pray For the Wicked are released.

July

 * July 6: Palo Santo is released.

August

 * August 17: Be the Cowboy & Sweetener are released.

September

 * September 21: Melt is released.

October

 * October 1: Time 'n' Place & Turn Off the Light: Vol. 1 are released.
 * October 26: Honey is released.
 * October 29: Super Sunset is released.
 * October 31: Am I a Girl? is released.

November

 * November 9: Singular: Act I is released.
 * November 16: LM5 is released.

January

 * January 18: Heard It In a Past Life is released.

February

 * February 1: The Sun Will Come Up, The Seasons Will Change is released.
 * February 8: Thank U, Next is released.
 * February 15: Head Above Water is released.

March

 * March 29: When We All Fall Asleep, Where Do We Go? is released.

April

 * April 5: Titanic Rising is released.
 * April 19: Cuz I Love You is released.
 * April 26: Love + Fear is released.

May

 * May 3: Symptoms is released.
 * May 17: Dedicated is released.
 * May 31: She is Coming is released.

June

 * June 28: Clarity is released.

July

 * July 12: III is released.
 * July 19: Singular: Act II is released.

August

 * August 2: Immunity is released.
 * August 23: Lover is released.
 * August 30: Norman Fucking Rockwell! & The Kids Are Coming are released.

September

 * September 6: K-12 is released.
 * September 13: Charli is released.
 * September 20: Sunshine Kitty is released.

October

 * October 1: Turn Off the Light is released.
 * October 18: Pang is released.

November

 * November 8: Magdalene is released.
 * November 15: Stella & Steve is released.
 * November 21: Songs for You is released.
 * November 22: Reflections is released.

December

 * December 6: Romance is released.

January

 * January 10: Rare is released.
 * January 14: I'm Too Sensitive For This Shit is released.
 * January 17: Manic is released.
 * January 31: High Road is released.

February

 * February 21: Cape God is released.

March

 * March 6: Silver Landings is released.
 * March 13: Heartbreak Weather is released.
 * March 20: After Hours is released.
 * March 27: Future Nostalgia is released.

April

 * April 17: Fetch the Bolt Cutters & Sawayama are released.

May

 * May 8: Petals for Armor is released.
 * May 13: Worlds on Fire is released.
 * May 15: How I'm Feeling Now is released.
 * May 21: Dedicated: Side B is released.
 * May 29: Chromatica is released.

June

 * June 12: Ungodly Hour is released.
 * June 18: Punisher is released.
 * June 26: What's Your Pleasure? is released.

July

 * July 17: Brightest Blue & Gaslighter are released.
 * July 24: Folklore is released.

August

 * August 14: Crave is released.
 * August 21: In a Dream is released.
 * August 28: Smile is released.

September

 * September 18: Heaven & Hell is released.

October

 * October 2: Roisin Machine & The Album are released.
 * October 26: Eyes Wide Open is released.
 * October 30: Positions is released.

November

 * November 6: Confetti & Disco are released.
 * November 13: Small Town Boy is released.
 * November 27: Plastic Hearts is released.

December

 * December 11: Evermore is released.