Taylor Swift & Jennifer Lopez Perform 'Jenny From the Block' - Watch Now!

Taylor Swift hits the stage with her special guest Jennifer Lopez for a surprise performance during her Red Tour concert on Saturday night (August 24) at the Staples Center in Los Angeles.

The 23-year-old singer and the 44-year-old American Idol judge took on the latter’s classic hit “Jenny from the Block.”

“You know how you have your favorite song that you just play over and over in your room?” Taylor asked the crowd before introducing JLo. “And you sing it in front of a mirror into a hairbrush? Los Angeles, this is my hairbrush song.”

Watch Taylor Swift and Jennifer Lopez sing “Jenny From the Block” below!