How can i help my friend?

My friend confronted me with a problem, and I don't know how to help her. She and I both know she's straight, and she likes a lot of good looking guys (ex Colin Ferrel, Hugh Jackman) but she says sometimes she finds herself subconsciously looking at cute girls like Rihanna and Jordana Brewster. She wants to stop this but since she doesn't consciously think about it, neither of us know how. Help pleeeease