Justin Bieber's 'Believe' Trailer: Mustaches, Saggy Pants & 'Train Wreck' Talk

Jutsin Bieber

Justin Bieber performs on the stage in concert at MasterCard Center on September 29, 2013 in Beijing, China

The official trailer for Justin Bieber's "Believe" film hit the Web on Friday (Nov. 15), and, as hinted at in Billboard's conversation with manager Scooter Braun about Bieber's 'Music Mondays' series and the upcoming film, "Believe" will be a decidedly more serious, revealing glimpse inside the life of the singer.

Sure, there are some light moments in there: Bieber jokes about his thin-as-heck mustache, his mom Pattie Mallette chides him about his saggy pants and there is some heartwarming shots from the Believe world tour. Intermixed, however, are grim quotes like "When you've reached a certain point in your life, there are people out there waiting to see you fall," as well as Bieber looking particularly troubled when asked if he's aware that his life could be seen as a "train wreck." Braun, Usher and Ryan Seacrest all pop up, but the focus is squarely on Bieber and his on-the-road, post-breakup psyche.

"Believe" hits theaters on Christmas Day. Before then, Bieber has four songs left in his 'Music Mondays' series, and will release a track with R. Kelly next week.