The lead dancer in Justin Bieber's Mistletoe video has spoken about how life has been different for her, from the time the video was launched.

My friends were freaking out a little more than I was, the 18-year-old told MTV News, I wasn't really prepared for all the stuff that was happening. I think that pretty much everyone has been pretty supportive. There are some things out there that are untrue, just as far as my age and stuff, but everyone has been really nice and supportive about that.

Ali Williams was informed of her selection when her agent mailed, quite at the last minute, her details of the audition. Williams was not really aware of the role she was expected to play but a little bit of research helped her figure out that she might be the lead in the Bieber video. She was officially informed of the role a day before the September shoot.

I definitely admire him. He's very successful in what he's doing. I wasn't too familiar with his music, but I was very excited to meet him, and I'm glad that I did, she confessed.

He was really nice. He was a good person. I heard that he was a nice guy, just from what you read in magazines and stuff, so I wasn't really worried about meeting him. He was ... really easy to get along with, really polite. As far as the kissing, it was very professional. It's just a job, she added.

Williams is currently studying journalism at Nashville's Belmont University, in addition to pursuing an acting career.

She also spoke about her satisfaction with the way the video turned out and was particularly pleased by the editing. She also admitted to having a lot of fun with all the snow and Santa Claus on the shooting sets, while it was 75 degrees outside and said that the video was certainly the best of her works.

Justin Bieber will give fans an early taste of Christmas, with his newest single and music video Mistletoe, to be aired on MTV, on Tuesday at 7:54 p.m. ET/PT. The song is part of a new holiday album, Under the Mistletoe, which features original songs as well as Bieber's renditions of Christmas classics. The album also features collaborations with Mariah Carey, Boyz II Men and others.