WHY

Teenage Dream Katy Perry All The Things She Said t.A.T.u. no tears left to cry Ariana Grande Judas Lady Gaga The Sweet Escape Gwen Stefani, Akon Lush Life Zara Larsson Oops!...I Did It Again Britney Spears Locked out of Heaven Bruno Mars Paparazzi Lady Gaga The One That Got Away Katy Perry thank u, next Ariana Grande Love You Like A Love Song Selena Gomez & The Scene Espresso Sabrina Carpenter Pink Pony Club Chappell Roan Sign of the Times Harry Styles Toxic Britney Spears Telephone - Cover of Lady Gaga feat Beyoncé Glee Cast Maneater Nelly Furtado Style Taylor Swift Last Friday Night (T.G.I.F.) Katy Perry Teenage Dream Katy Perry All The Things She Said t.A.T.u. no tears left to cry Ariana Grande Judas Lady Gaga The Sweet Escape Gwen Stefani, Akon Lush Life Zara Larsson Oops!...I Did It Again Britney Spears Locked out of Heaven Bruno Mars Paparazzi Lady Gaga The One That Got Away Katy Perry thank u, next Ariana Grande Love You Like A Love Song Selena Gomez & The Scene Espresso Sabrina Carpenter Pink Pony Club Chappell Roan Sign of the Times Harry Styles Toxic Britney Spears Telephone - Cover of Lady Gaga feat Beyoncé Glee Cast Maneater Nelly Furtado Style Taylor Swift Last Friday Night (T.G.I.F.) Katy Perry