Bruno Mars Performs ‘Locked Out of Heaven’ on ‘X Factor U.K.’
We'll still have to wait until next month to hear Bruno Mars' complete 'Unorthodox Jukebox,' but the frequently hatted singer helped whet our appetites for his second album with a recent appearance on the U.K. version of 'X Factor' -- complete with a live performance of the set's leadoff single, 'Locked Out of Heaven.'