Pop singer Justin Bieber on Monday released a new song not long after giving fans the trailer for his upcoming documentary.

All That Matters is available for purchase on iTunes and is the second single off Bieber's upcoming album, which he has yet to announce a name for.

"Just as sure as the stars in the sky/I need you to shine in the light/Not just for the meanwhile, for a long long time/ better believe it," he begins the R&B-inspired track by singing. The chorus reads:

"You're all that matters to me/Yeah yeah, ain't worry about nobody else/If I ain't with you, I with myself/You make me complete/You're all that matters to me."

Bieber recently launched the hashtag project #MusicMondays, in which he promises to debut a new song every week for 10 weeks leading up to the release of his new film. The series kicked off last week with the premiere of the slow tempo single Heartbreaker.   

The 30-second teaser trailer for Bieber's upcoming Believe 3D was released on Oct. 11, and the clip begins with a joke about the singer's mustache.

"Come here, have you seen this manhood right here?" manager Scooter Braun says in the opening scene, pointing to the fuzz the singer is growing.

Hanging out in a kitchen, Bieber takes pride in his facial hair, saying, "That's how much of a man I am." He then clears his throat and blurts out what soon became a trending hashtag: "#stache."

His mentor Usher also weighs in on Bieber's maturity, saying, "As a 19-year-old Justin is becoming his own man." Bieber chimes in and says, "Speaking of grown man, I'm drinking coffee right now."

His mother, Pattie Mallette, makes a cameo and talks about letting go as a parent. She said it is great to see her child mature, and then the footage cuts to a shot of Bieber standing behind a kitchen counter and pretending to walk down some steps.

The video ends with a Bieber in concert as fireworks explode behind him and the screen fades to black with the words "There's more to his story."

The movie, directed by Jon M. Chu, is slated to hit theaters around Christmas. The teaser trailer is part of a new series of clips released by Bieber called #FilmFridays.

Tags: Justin Bieber