In his acceptance speech, Usher said "getting here hasn't been easy, but it's been worth it".

The R&B star performed a hit-heavy half-time show with help from will.i.am and Alicia Keys.

R&B singer Usher will celebrate 30 years of hits, when he takes to the stage in Las Vegas.

The star, whose hits include Yeah! and Confessions, follows Rihanna in taking the coveted slot.