Tim Nwachukwu/Getty Images Usher doesn't think his intimate moment with Alicia Keys during ... of their 2004 collaboration "My Boo." Usher ultimately said he and Keys' music producer husband ...

During Usher's electrifying Super Bowl halftime show, Alicia Keys made a surprise appearance to perform their hit "My Boo," as well as a snippet of her song "If I Ain't Got You." While many fans ...