Taylor Swift was in LA over the weekend for a sold-out show at The Staples Center. She is breaking all kind of records on her 1989 World Tour. Taylor is always bringing out superstars to rock out on stage with her and this show was no exception. She brought out the Queen of Hip Hop Soul Mary J. Blige to spice up her set. And the crowd went wild once Mary stepped out on the stage. They performed a duet of Mary’s single “Doubt,” (from The London Sessions), then they hyped up the crowd with a performance of Mary's 2001 hit “Family Affair.” Check out Taylor Swift and Mary J Blige singing together below.