Bridgit Mendler waves to fans as she arrives at the Grove for Extrapalooza on Monday afternoon in Los Angeles (September 10).

The 19-year-old actress/singer hit up the concert event to help Extra celebrate its 19th anniversary. Boyfriend Shane Harper was also spotted around the area watching Bridgit perform.

PHOTOS: Check out the latest pics of Bridgit Mendler

Later that night, Bridgit headed out to the premiere of The Perks of Being A Wallflower with BFF Samantha Boscarino at Arclight Cinemas in Hollywood.

25+ pics inside of Bridgit, Shane and Sam

Photos: AKM-GSI, WENN

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