Anna Faris in Just Friends.
I love Anna. I've seen her in everything I could find, and it's all good.
(... Uhm, with a few possible exceptions, like Brokeback Mountain. I don't think I even made it through to the parts she were in. A drama/romance with two guys? Two cowboys? That's a worse idea than Titanic.)
I also recently saw her in Observe And Report, which is one of those modern comedies where they try to push all the gag levels (as in "I almost gagged when I watched that") to the max. But it was funny, if you can stomach it. (Wow, prices on DVDs have dropped! This one is $3.61 on Amazon right now. I wonder if that's because of blu-ray?)