Justin Bieber Stops By the 'Midnight Sun' Premiere!

Justin Bieber made a surprise appearance on the red carpet at the premiere of Midnight Sun on Thursday night (March 15) at the ArcLight Hollywood Theater in Hollywood, Calif.

The 24-year-old singer kept things cool in a black sweatshirt as he stepped out to support close pal Patrick Schwarzenegger at the premiere of his new movie.

PHOTOS: Check out the latest pics of Justin Bieber

Also joining Patrick at the premiere was his longtime girlfriend Abby Champion along with his family including mom Maria Shriver and his older sisters Christina and Katherine.

Midnight Sun hits theaters on March 23!

20+ pictures inside of the celebs at the premiere…