Taylor Swift & Shirtless Jason Derulo Duet on 'Want to Want Me': Watch
Taylor Swift continued to show off her A-list pals at the 1989 tour stop in Washington, D.C. last night (July 14) -- this time, though, there was a little added sex appeal.
Jason Derulo joined the singer for a duet of his hit single "Want To Want Me"...and in the middle of the song, he decided to amp things up a little. Removing his pesky shirt, Derulo showed off his ripped physique as Taylor squealed in delight -- watch some fan videos of the performance below.
During the previous D.C. 1989 show, Swift brought out Lorde for an impassioned "Royals."