Lopez, 44, and Swift, 23, first teamed up on Aug. 25 when Lopez made a surprise appearance during Swift's concert and they sang Lopez's 2002 hit "Jenny From the Block." Soon after, the two decided one collaboration wasn't enough.
"Sang Jenny From the Block with @JLo tonight at Staples Center. STILL FANGIRLING OUT ABOUT IT," Swift tweeted after the show. Lopez replied, saying she had "so much fun" singing with Swift.
Lopez, who just signed on to return to American Idol, is currently working on her eighth studio album. Maybe the two can debut their new song on Idol?
Are you excited for Lopez and Swift to duet on a new song?