She's still Jenny from the block!
Part way through her Red Tour show in L.A. Taylor Swift brought Jennifer Lopez on stage to perform her hit song 'Jenny From the Block.'
“You know how you have your favorite song that you just play over and over in your room?" Taylor said to the crowd before the American Idol judge appeared.
"And you sing it in front of a mirror into a hairbrush?"
"Los Angeles, this is my hairbrush song.”
Lopez then appeared at the top of the stage dressed in silver glitter as the crowd went wild.
Watch the two perform 'Jenny From the Block' below.