Claire (Witt) is having trouble getting her concert piano career on track thanks to a semi-functional family, romantic woes, and kookie friends. "Playing Mona Lisa" is a formula sitcom quality flick full of cliche characters with just enough of a creative edge to keep me from thumbing the fast-forward button. There's little new here and nothing to get excited about. However, "Playing Mona Lisa" might be worth a look for the couch potato surfing for chick flix. (C)