Kristen Stewart: 'My Valentine' World Premiere Party

Kristen Stewart hits up the world premiere of the “My Valentine” video on Friday (April 13) in West Hollywood, Calif.

The 22-year-old actress wore a fun Stella McCartney skirt and blazer for the music video release hosted by Paul McCartney and his daughter, designer Stella.

PHOTOS: Check out the latest pics of Kristen Stewart

Earlier this week, Kristen celebrated her birthday! As a special treat, three of her Snow White and the Huntsman co-stars, Charlize Theron, Chris Hemsworth, and Sam Claflin, left her personal YouTube messages � check it out on JustJared.com!