"I'm so nervous right now. I've been watching this whole damn show," said Darren Criss. The Golden Globe winner (whose Broadway play American Buffalo was postponed) joined the star-studded lineup of the one-night-only return of The Rosie O'Donnell Show on March 22. Hosted by Tony winner O'Donnell, the Broadway.com webstream raised over $600,000 in support of The Actors Fund. For his appeara…
