By Jessica Goodman
Updated July 15, 2015 at 12:51 PM EDT
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Paul Morigi/LP5/Getty Images

Taylor Swift brought out yet another chart-topping artist during the 1989 tour.

Recent guest performers/ BFFS have included Lorde, Nick Jonas and The Weeknd. But this time, Swift introduced Jason Derulo to perform his hit, “Want To Want Me,” off the album Everything Is 4. “I listen to that song everyday,” Swift said before Derulo came on stage.

They dueted. He took his shirt off. Looked like fun!

See some fan-shot footage:

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