Usher delivered a high-energy Super Bowl halftime show in Las Vegas on Sunday that featured surprise appearances by some of his most famous collaborators as the R&B star rolled through a parade of his hits.
The stadium was packed with huge names from the world of music, including Paul McCartney, Lady Gaga and Taylor Swift, who was at the game to cheer on her boyfriend, Kansas City Chiefs tight end Travis Kelce.
Sitting at a red piano, Alicia Keys was the first to be revealed on stage as she and Usher reunited to perform their 2004 duet My Boo.
Usher, right, and Alicia Keys perform
