Gossip Girl star Taylor Momsen (Jenny Humphrey) graces the cover, and is featured all over the inside, of the January issue of CosmoGirl Prom.

The 15-year-old actress, model and Gossip Girl troublemaker dished to the magazine about her memorable prom experience: “Most of my friends were seniors and they were like, ‘You sit at our table every day, so you have to come to our prom.’ ... It’s fun to say our prom was on Friday the 13th. I’ll never forget the date!”

"... Everyone else took off their shoes as soon as they got there, but I kept my feet clean. I never get into the vanity of that type of thing. It’s with my friends. If I’m uncomfortable, then I’m not even in my own skin. You can look good and still be comfortable.”

As for her advice to her much-maligned Gossip Girl alter ego, Little J, Taylor Momsen says, “Go [to the prom]! I don’t live a traditional life, so I’m glad I went. It’s an important life stepping stone that everyone should experience.”

Click to enlarge more Taylor Momsen photos from CosmoGirl Prom!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.