As the city of Denver prepares for this week's Democratic convention, numerous Hollywood celebs are planning to attend in support of Barack Obama and to advocate for pet issues. Gushes Variety,

When Barack Obama accepts the nomination before some 75,000 people at a Denver stadium on Thursday, he'll be surrounded by a contingent of average Americans from all walks of life --- just not Hollywood performers, musicians and other famous figures who have so publicly championed his candidacy.

So what, exactly, will be the role of celebrity during the week of the Democratic National Convention?