Selena Gomez may be dating Justin Bieber but she's got celebrity crushes just like the rest of us -- and last night, she got to meet one of them!

Shia LaBeouf -- who Gomez once admitted was her crush -- surprised the 19-year-old singer in a dressing room backstage at a TV appearance. Gomez's friends had apparently told her she was going to meet with fans.

Selena's reaction upon seeing Shia was just priceless -- check her out running out of the room!

She was still gushing after, telling her friends "He's so cute ... he's so handsome."

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