With the template for Valentine's Day rom-coms so firmly established, it's pleasant to run across a movie that tries to tweak the formula. Unfortunately, the effort put forward by Adam Brooks in Definitely, Maybe winds up getting hoisted on its own tweaky petard. Ryan Reynolds plays Will Hayes, a soon-to-be-divorced dad seeking to answer the simple question put forth by his daughter: "How did you and Mom meet?" Director/screenwriter Brooks answers the question by telling of the three women Dad fell in and out of love with, often contemporaneously. This mystery/love story is supposed to mollify young Maya (Abigail Breslin), and it's also supposed to keep the audience guessing as to his true love's identity. In reality, it's sure to do lasting psychological damage to both. The ping-ponging between Emily (Elizabeth Banks), April (Isla Fisher), and Summer (Rachel Weisz) quickly goes from intriguing to redundant as Brooks puts poor Maya--and the audience--through round upon round of who's-in-love-with-whom. Add in a moment where Will gets his heart truly broken--by Bill Clinton--and it's clear that sometimes tweaking the formula isn't such a good idea.