Megan & Liz: 'Believe' Premiere Beauties

Megan and Liz step out for the premiere of Justin Bieber‘s brand new docu-film Believe held at Regal Cinemas L.A. Live on Wednesday night (December 18) in Los Angeles.

The 21-year-old singing sisters tweeted their excitement ahead of the event, “Hey all you @justinbieber fans…. You’ll like what we’re doing a little later.”

PHOTOS: Check out the latest pics of Megan And Liz

Megan and Liz also shared a holiday playlist with their fans on YouTube.

“Just a few of our favorite holiday songs to keep you warm this winter! Turn it on and get festive! xoxo,” they wrote. Check it out!