What Am I Missing?

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