Demi Lovato confirmed to star in new series of Glee

Demi Lovato confirmed to star in new series of Glee, The 21-year-old singer-actor will appear in multiple episodes of the show's upcoming fifth season, her publicist confirmed Friday.

Glee star Lea Michele tweeted Thursday that she was excited that two of her "very best friends" - Lovato and Broadway vet Phoebe Strole - would appear on the Fox show, and thanked creator Ryan Murphy for making it happen.

The show was recently hit by tragedy after star Cory Monteith died of a drug overdose. Monteith, 29, who was dating co-star Michele, was found dead last month in a Vancouver hotel room after overdosing on heroin and alcohol.

Lovato is in her second year as a mentor on The X Factor. She starred on the Disney Channel's Sonny With a Chance for two seasons.

The new season of Glee premieres September 26 in the US.