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Whoever would have guessed that these two would record a song together?!

After taking the stage together last month at the Staples Center in Los Angeles, Jennifer Lopez and Taylor Swift are set to collaborate on a new song, reports Us Weekly.

"Sang Jenny From the Block with @JLo tonight at Staples Center. STILL FANGIRLING OUT ABOUT IT," Taylor tweeted after the show. Lopez tweeted back, "@taylorswift13 had so much fun with you tonight!!! #RedTourLA #jennyfromtheblock #hairbrushsongs."

"Both of them are huge fans of each other and excited to work together," a source tells the mag. No word on what the track might be, but it will appear on Lopez's upcoming eighth album, which is due out early next year.