Tessa Thompson

The Met Gala might not have an official end time ... but these stars knew when it was time to pack up and head out to the after-party. Big-time stars left The Metropolitan Museum of Art Monday night and headed for a couple parties thrown by major brands ... celebs like Hailey Bieber, Tessa…

It was star power at the LACMA Art+Film Gala over the weekend ... where Hollywood heavyweights traded movie sets for museum steps, and the red carpet turned into a who's who of fame and fashion. The annual bash drew some of the biggest names in entertainment, including Cindy Crawford, Angela…