“Both of them are huge fans of each other and excited to work together!” the source tells Us.
Swift, 23, and Lopez, 44, finalized the plan after the “On the Floor” singer came out as Swift’s last guest performer on her final Red Tour show at L.A.’s Staples Center. During the Aug. 25 performance, the two sang Lopez’s 2002 hit “Jenny from the Block.”
“Sang Jenny From the Block with @JLo tonight at Staples Center. STILL FANGIRLING OUT ABOUT IT,” the “I Knew You Were Trouble” singer tweeted after the show. Lopez replied: “@taylorswift13 had so much fun with you tonight!!! #RedTourLA #jennyfromtheblock #hairbrushsongs.”
Source: US Magazine