What's the Name of That Movie?

Arrgh, you know the one! There's this dysfunctional family, and their little daughter gets invited to come compete in the "Little Miss Sunshine" beauty pageant? I think that guy who used to host Talk Soup is in it? They take a Volkswagen van across the country to go to the pageant. And then at the end, the girl does this crazy routine at the "Little Miss Sunshine" show?

It's driving me crazy!