If anyone is curious, here are the 2015 recurrents.
Recurrents of 2015
Artist "Title" #Peak
Alesso "Heroes (We Could Be) (feat. Tove Lo)" #11
Andy Grammer "Honey, I'm Good" #08
Ariana Grande "Love Me Harder (feat. The Weeknd)" #03
Ariana Grande "One Last Time" #06
Calvin Harris "Blame (feat. John Newman)" #03
Calvin Harris "Outside (feat. Ellie Goulding)" #08
David Guetta "Hey Mama (feat. Minaj/Rexha/Afrojack)" #02
DJ Snake & AlunaGeorge "You Know You Like It" #07
Echosmith "Bright" #16
Ed Sheeran "Don't" #02
Ed Sheeran "Thinking Out Loud" #01
Ella Henderson "Ghost" #11
Ellie Goulding "Love Me Like You Do" #01
Fall Out Boy "Centuries" #12
Fifth Harmony "Worth It (feat. Kid Ink)" #04
Flo Rida "GDFR (feat. Sage the Gemini)" #08
Hozier "Take Me To Church" #02
Jason Derulo "HeWhoCannot amedets" #10
Jason Derulo "Want to Want Me" #01
Jeremih "Don't Tell 'Em (feat. YG)" #06
Jessie J, Ariana Grande & Nicki Minaj "Bang Bang" #01
Lillywood & Robin Schulz "Prayer in C" #07
Mark Ronson "Uptown Funk (feat. Bruno Mars)" #01
Maroon 5 "Animals" #01
Maroon 5 "Sugar" #01
Meghan Trainor "Lips Are Movin" #04
Mr Probz "Waves (Robin Schulz Mix)" #05
Natalie La Rose "Somebody (feat. Jeremih)" #03
Nick Jonas "Chains" #06
Nick Jonas "Jealous" #01
One Direction "Night Changes" #13
Pitbull & Ne-Yo "Time of Our Lives" #04
Sam Smith "I'm Not The Only One" #04
Selena Gomez "The Heart Wants What it Wants" #07
Taylor Swift "Blank Space" #01
Taylor Swift "Shake It Off" #01
Taylor Swift "Style" #01
The Weeknd "Earned It" #01
Tove Lo "Habits (Stay High) #01
Tove Lo "Talking Body" #04
Vance Joy "Riptide" #18
Walk the Moon "Shut Up and Dance" #02
Wiz Khalifa "See You Again (feat. Charlie Puth)" #01