R&B singer Usher excites crowd during Super Bowl halftime show. He delivered a medley of the greatest hits of his nearly 30-year musical career.
He was first joined by Alicia Keys, in a sequined red outfit to match her piano, who performed "If I Ain't Got You", then "My Boo" with Usher. Other artists followed one another to contribute to the musical fireworks: HER for a guitar solo, will.i.am, Jermaine Dupri, Lil Jon and Ludacris.