I really like Patrick Fugit in Almost Famous!
And off the top of my head, a bad performance (or at least one that irked me) in a good movie was Claire Danes in Stage Beauty. She has such an annoying voice. I'm sure there are many others that'll come to mind, but I just saw this and she really irked me.
Oh, and yeah...Andie McDowell is pretty horrific. She didn't ruin Groundhog Day, but just think how much better it could have been! God, I love Bill Murray!
But when did New Hampshire become--Such a backward wasteland of seatbelt hating crazies?...I mean, only 40 people actually live there. The others are just visitors who come for the tax-free liquor and three inches of novelty coastline. John Hodgeman on The Daily Show (1-30-07)