Washington, Aug. 11 -- Demi Lovato is returning to 'Camp Rock' as Mitchie Torres, with Disney confirming that the singer and actor will make a surprise cameo in the upcoming third film, just days before its premiere.

As per Deadline, Lovato is also serving as an executive producer on 'Camp Rock 3', which continues the franchise nearly two decades after the original film debuted on Disney Channel in 2008. The sequel, 'Camp Rock 2: The Final Jam', followed two years later.

The third instalment already features several callbacks to the earlier films. The Jonas Brothers are returning as Shane, Nate and Jason Gray of Connect 3, while Maria Canals-Barrera reprises her role as Connie, Mitchie's mother, who is now the camp director.

"Camp Rock...