Taylor Swift, Mary J. Blige Photo

From: Photo Flash: Mary J. Blige, Chris Rock, and More Join Taylor Swift Onstage at the Staples Center

At her August 22nd 1989 World Tour stop in Los Angeles, Calif., Taylor Swift surprised the crowd with multiple guest stars who joined her on stage. Included in the lineup was singer Mary J. Blige, who debuted two new songs with Swift, as well as actors Chris Rock, Matt LeBlanc, model Sean O'Pry, who came on stage while Taylor Swift sang 'Style,' and Uzo Aduba, who performed 'White Horse,' with Swift. In addition, Taylor Swift met up with PARKS AND RECREATION star Adam Scott and his family backstage after the show. Check out photos of the stars together below!