Sandra Bullock Poster in Spell Struck

Yesterday I took a break from writing and drove to the Regal to watch "The Heat," starring Sandra Bullock and Melissa McCarthy. A couple of hours later, pumped up on female empowerment and friendship, I headed home. During the drive back, I remembered that Spell Struck, Book 2: The Teen Wytche Saga, features another Sandra Bullock movie poster.

Can anyone guess which movie?
How about which character has the poster?

No fair peeking on my Facebook page for the answers!
~Ariella Moon