Napster co-founder and former Facebook president Sean Parker Sean Parker has invested in StageIt, an online live concerts website. Parker has a lot of experience in the music business so StageIt would be able to benefit by having Parker as an investor.

[Left: Shawn Fanning, Right: Sean Parker]

Shawn Fanning and Sean Parker is best known for working together on Napster. Sean Parker was referred to as a co-founder in Napster in the movie The Social Network, but he was an early employee in the music sharing company that Shawn Fanning founded. Now the two are working together on a new video chat project called Yo.

Former Google CEO Eric Schmidt, former Facebook president Sean Parker, Demand Media founder Richard Rosenblatt, former News Corp. COO Peter Chernin, Andreessen Horowitz co-founder Marc Andreessen, WPP, and Mubadala Development have invested in Raine. Raine is a merchant bank that was founded by Ari Emanuel and two former Wall Street dealmakers. Fans of the TV show Entourage will probably know Emanuel best for having the character Ari Gold based on him.

Sean Parker is best known for being the co-founder of Napster, founding president of Facebook, founder of Plaxo, and founder of the Causes Facebook application. Pop artist Justin Timberlake portrayed Sean Parker’s time as President of Facebook in the Academy Award winning movie The Social Network. Parker criticized the movie by calling it a “complete work of fiction” in terms of his character. Lenas is a singer-songwriter that dated Parker for six months before getting engaged. They were first seen as a couple at Heidi Klum’s annual Halloween party. Parker was dressed like Justin Timberlake and Lenas was dressed like Britney Spears. [Zap2It]

Sean Parker, the founding president and co-founder of Napster, suggested Facebook’s mascot should be a hedgehog at one point Early Facebook employee Ezra Callahan told the mascot story on Quora.

Causes is an online philanthropy service that was started by Joe Green and Sean Parker. Causes recently raised $9 million in Series C funding from Founders Fund, Marc Benioff, Dustin Moskovitz, Karl Jacob, Keith Rabois, and Ron Conway. Scott Sandell will also be joining as an observer on the Causes board of directors. Green said that the company plans to use the funding for building their team.

Facebook’s founding president and co-founder of Napster Sean Parker has donated $100,000 to the initiative for legalizing marijuana in California. Parker is a venture capitalist for the Founders Fund and is one of the founders of the Causes Facebook application.

Remember Napster? It was the music sharing service that was created by Shawn Fanning and Sean Parker in 1999 and ended up shutting down after the RIAA went after them for copyright violations.