Demi Lovato is proving to be a supportive friend!

The 33-year-old singer showed up to support her best friend, Matthew Scott Montgomery, at the opening night performance of his new play Foursome on Thursday (February 19) in Los Angeles.

Not only is Matthew starring in the play, he also wrote it!

Foursome‘s world premiere production is is being produced by IAMA Theatre Company and Celebration Theatre in Los Angeles. The production is running in Atwater Village through March 23.

In the new romantic comedy, four friends gather for a weekend getaway, armed with champagne, secrets, and enough emotional baggage to fill the trunk twice over. As pop anthems echo through the cabin, what begins as a warm, wine-drenched reunion becomes a powder keg of desire, miscommunication, history, unexpected revelations, and more. Get tickets now!

Matthew starred in the Disney Channel series So Random, which was a spinoff of Demi‘s show Sonny with a Chance.