Guest blogger Chris Kaltenbach here:In accepting his Best Actor Oscar for "The King's Speech," Colin Firth kept hinting that he was about to break into a dance. Hey, the guy's happy, he wants to celebrate, and his feet felt like moving.Only he didn't dance. And backstage, when asked to do a quick two-step in front of reporters, he said "No" as well, suggesting that wasn't something anyone really wanted to see."Anyone who's seen 'Mama Mia!' will know what I'm talking about." And sure enough, anyone who ever sat through "Mama Mia!" did.Colin Firth, with Oscar. Credit: Getty Images.