LOS ANGELES, Sept. 29 (UPI) -- Joe Jonas made a surprise appearance at Demi Lovato's concert Saturday in Los Angeles.
The 25-year-old singer sent fans into a frenzy when he joined ex-girlfriend Lovato onstage to perform "This is Me." The song originates from the 2008 Disney Channel movie Camp Rock, which co-starred Lovato and Jonas. The pair briefly dated in 2010, and have remained good friends.