Usher Super Bowl Halftime review: Alicia Keys and more guest stars

Usher’s 13-minute Super Bowl halftime show was entertaining from beginning to end, as he ran through a high-energy setlist. The R&B singer surprised fans by bringing out six special guests, including Alicia Keys, Jermaine Dupri, and H.E.R. The audience then went wild when Lil Jon and Ludacris joined a roller-skating Usher for an epic, roof-raising rendition...