Few things give celebrities serious person street cred like attaching themselves to organizations that do global good. The grand-daddy of those organizations is the Clinton Global Initiative, which has in years past attracted the likes of Bono (and various other members of U2), Lance Armstrong, Matt Damon, Brad Pitt, Ashton Kutcher and Demi Moore, to their annual meeting at the Sheraton hotel in midtown Manhattan.

But this year's celebrity roster has been relatively sparse.

"It has been celebrity-lite this year. In years past, CGI has been a little like walking around the Sundance Film Festival. But this year we're seeing more serious heads of state and titans of industry and less rock stars," said Lisa Germinsky, the managing editor of Tonic.com, who has been diligently live blogging the event.

Latin diva Shakira and actor Antonio Banderas were two of the only celebrities confirmed to attend the event, which is happening for the next three days.

On Tuesday morning, rocker lady Avril Lavigne tweeted that she was attending the opening session moderated by former President Clinton.