Clap for Pharrell Williams, whose bouncy single "Happy" reaches the top of the Billboard Hot 100 with a 2-1 rise. The song unseats Katy Perry's "Dark Horse," featuring Juicy J, which reigned the ...

hand-clapping take on the Pharrell Williams' 2014 hit, "Happy." "When I was about 9, I got to go on the road and sing this song with the Backstreet Boys in front of 10,000 people every night and it ...

Littrell, 22, of Georgia, sang his breezy, hand-clapping take on the Pharrell Williams' 2014 hit, "Happy." "When I was about 9, I got to go on the road and sing this song with the Backstreet Boys ...