VIDEO: Jason Derulo & Taylor Swift Surprise Crowd with 'Want To Want Me' Duet

The A-list guest appearances continued last night as Jason Derulo made a surprise appearance duirng Taylor Swift's Washington D.C. stop on her current The 1989 World Tour. The 'So You Think You Can Dance' judge performed a duet of his hit song, Want To Want Me! for the adoring crowd. Watch the video!

Derulo shared a photo of the appearance on Twitter yesterday, along with the caption: "Last night was so fly @taylorswift13 ! Thank u 4 having me join the party luv!" He joins a growing list of performers joining Swift on her tour, including Nick Jonas, Lorde, Haim, and The Weeknd!

Swift has been honored by the NASHVILLE Songwriters Association and the Songwriters Hall of Fame. Swift's other achievements include seven Grammy Awards, twelve Billboard Music Awards, 11 Country Music Association Awards, eight Academy of Country Music Awards, and one Brit Award.

She is one of the best-selling artists of all time, having sold more than 40 million albums-including 27.1 million in the U.S.-and 100 million single downloads. Swift has also had supporting roles in feature films including Valentine's Day (2010) and The Giver (2014).

Photo: Twitter