Justin Bieber

The venture signals that YouTube stars with palpable buzz and inbuilt fan bases have become increasingly enticing to the world's biggest music corporations.

Brands have paraded A-listers out front as spokespeople for ages, but in recent years they've been joining as investors. Here, we examine when it works and what entrepreneurs should keep in mind as they team up with celebs.

The 19-year-old pop star reportedly led a $1.1 million seed round for a new social network called Shots of Me.

Three lessons from the teen pop sensation's Twitter strategy.