The two singers performed Lopez’s song “Jenny From The Block,” to the delight of the audience.
“You know how you have your favorite song that you just play over and over in your room?” Swift told the crowd. “And you sing it in front of a mirror into a hairbrush? Los Angeles, this is my hairbrush song.”
Taylor and Jennifer wrote each other a message on Twitter.
“Sang Jenny From the Block with @JLo tonight at Staples Center. STILL FANGIRLING OUT ABOUT IT,” Swift wrote.
Lopez tweeted: “@taylorswift13 had so much fun with you tonight!!!”
What do you think about their duet?