Justin Bieber has joined the ranks of Jessica Simpson, Katy Perry, and Jennifer Love Hewitt to become the latest star to promote anti-acne product Proactiv. Watch the video below.

Bieber lists a few things that come with age: your feet grow ("Can't stop that", he says), your hormones kick in ("I don't wanna stop that), and then zits ("Can stop that"). The spot also features him playing basketball while espousing the features of the product.

Maybe Proactiv can help heal his face after he got whacked by a water bottle the other day while playing a concert.

Justin Bieber Photos