Jennifer Lopez & Taylor Swift Team Up to Sing "Jenny From the Block"

"You know, when you have your favorite song that you just play over and over, and that you sing in front of your mirror into a hairbrush?" Taylor Swift asked fans during one of her sold-out Los Angeles shows this weekend.

According to The Huffington Post, Swift was referring to Jennifer Lopez's 2002 hit "Jenny From the Block" when speaking of her "hairbrush song."

Swift surprised the crowd when she brought J.Lo to the stage to perform the song.

Lopez showed up rocking a glittery silver jumpsuit and hat -- classic J.Lo, for sure!

Click on to page 2 to watch the performance >>>