For me:
1st song: "Dance Wiv Me" - Calvin Harris, Dizzee Rascal, Chrome
100th song: "We'll Be Coming Back" - Calvin Harris ft. Example
1000th song: "Otis" - Jay Z and Kanye West
5000th song: "Midnight City" - M83
10000th song: "Safe and Sound" - Capital Cities
20000th song: "Let It Go" - Idina Menzel
500 work Iggy azalea
1000 swim good frank ocean
5000 automatic Nicki Minaj
10000 ...baby one more time Britney spears
20000 once upon a dream Lana Del rey
#1 Amy Winehouse: You Know I'm No Good
#100 Star****er: The White of Noon
#500 The Pretty Reckless: Make Me Wanna Die
#1000 Glee Cast: Jessie's Girl (live) (rip)
#5000 Crystal Castles: Empathy
#10000 Adele: Right as Rain
#20000 Azealia Banks: Nathan Ft. Styles P
#30000 will.i.am: This Is Love (feat. Eva Simons)
#1: Aaliyah - Miss You
#100: Eminem - My Name Is
#500: Drake - The Motto
#1000: Ke$ha - Blow
#5000: Rihanna - Birthday Cake
#10000: Nicki Minaj - Roman's Revenge
#20000: Rihanna - Get It Over With
#30000: Amerie - Why Don't We Fall In Love
#40000: Zedd - Clarity
#50000: Justin Bieber - Santa Clause Is Comin' To Town
#60000: Mariah Carey - Makin' It Last All Night (What It Do)
1 - Starships by Nicki Minaj
100 - All Alone by fun.
500 - Countdown by Beyoncé
1,000 - Masquerade by Nicki Minaj
5,000 - Whip It by Nicki Minaj
10,000 - Free by Natalie Kills
20,000 - Long Time Comin' by Nicki Minaj
30,000 - No Problems by Azealia Banks
1 - I Like It Rough [Gaga]
100 - A Year Without Rain [Selena]
1000 - (Wanna Get To Know You) That Good! [Shania]
10000 - Money Honey [Gaga]
20000 - Criminal [Britney]
30000 - Kiss You All Over [Britney]
40000 - Love Will Remember [Selena]
1 - I Like It Rough [Gaga]
100 - A Year Without Rain [Selena]
1000 - (Wanna Get To Know You) That Good! [Shania]
10000 - Money Honey [Gaga]
20000 - Criminal [Britney]
30000 - Kiss You All Over [Britney]
40000 - Love Will Remember [Selena]
D. #1000Ciara: Read My Lips
2014-2-26
C. #500Katy Perry: Dark Horse (feat. Juicy J)
2014-2-16
B. #100Beyoncé: Drunk in Love (feat. Jay Z)
2014-2-2
A. #1Beyoncé: Drunk in Love (feat. Jay Z)
2014-1-26
#1 TLC - Waterfalls
#100 Shakira - Islands
#1000 Kelly Clarkson - Since U Been Gone
#2000 Nicki Minaj - Stupid Hoe
#10000 Britney Spears - Till The World Ends
#50000 Ellie Goulding - Lights
#100000 Ciara - Promise
For me:
1st song: "Dance Wiv Me" - Calvin Harris, Dizzee Rascal, Chrome
100th song: "We'll Be Coming Back" - Calvin Harris ft. Example
1000th song: "Otis" - Jay Z and Kanye West 5000th song: "Midnight City" - M83
10000th song: "Safe and Sound" - Capital Cities
20000th song: "Let It Go" - Idina Menzel
#1 Thrice: Red Sky
#100: Brandi Carlile: The Story
#500: Michelle Branch: Goodbye To You
#1000: Within Temptation: See Who I Am
#5000: Fuel: Falls on Me
#10000: Hoobastank: Disappear
#20000: Finger Eleven: One Thing
#30000: The Cranberries: Linger
#40000: Evanescence: The Only One
#50000: After Forever: Cry With a Smile
#60000: Tarja Turunen: Our Great Divide
#70000: Alanis Morissette: Crazy
#80000: Jonna Lee: Electric Feel
#90000: Linkin Park: Don't Stay
#100000: Michael Jackson: You Are Not Alone
#110000: The Fray: Over My Head (Cable Car)
#120000: Ellie Goulding: Under The Sheets [LIVE]
A. #1 Radiohead: Fitter Happier
B. #100 Fleetwood Mac: Never Going Back Again
C. #500 Marvin Gaye: If I Should Die Tonight
D. #1000 Marvin Gaye: The End Of Our Road
E. #5000 Queen: Who Wants to Live Forever
I created a new account in January, so only up to 5k so far
F. #10000 St. Vincent: Landmines
2014-2-2
E. #5000 Lorde: Ribs
2013-9-24
D. #1000 Bat for Lashes: Two Planets
2013-6-4
C. #500 Lana Del Rey: National Anthem
2013-5-27
B. #100 Charli XCX: Nuclear Seasons
2013-5-15
A. #1 Fiona Apple: Hot Knife
2013-5-12
the consistency 
I used the last.fm radios until I discovered that I could use this stuff. 
