Taylor Swift is keeping a steady supply of surprise guests coming to team up onstage for her Red Tour. The night after Ellie Goulding joined the singer for a duet of "Anything Could Happen" at Los Angeles' Staples Center, Swift brought out none other than Jennifer Lopez to help her sing "Jenny From the Block" at the same venue.
"When I was a little girl, you know you have your favorite song that you just would play over and over and over again and just blast it in your room, and you’d sing in front of your mirror into a hair brush?" Swift asked the crowd, just before the 2002 hit's intro started pounding and J. Lo rose from a glittering platform behind the stage. "Los Angeles, this is my hair brush song."