Louis Tomlinson performed his debut single as a solo artist, 'Just Hold On,' for the first time in the U.S. last night on 'The Tonight Show Starring Jimmy Fallon.'
Between Lady Gaga, Carrie Underwood and Calvin Harris, these stars will keep you entertained — and you can watch their clips without having to leave Twitter.
Electronic artist Steve Aoki gives featured artist Kid Cudi the spotlight on 'Cudi the Kid,' a new song targeted for Aoki's upcoming album, 'Wonderland.'