Tina Fey and Amy Poehler in Baby MamaBABY MAMA

Despite its sunny, friendly veneer, there's a rather scrappy little war being waged within writer/director Michael McCullers' Baby Mama - one between a lighthearted, pleasant sitcom and a sharper, smarter, more cynical sitcom. (Two and a Half Men versus 30 Rock, as it were.) The former wins, and we could have predicted as much, but the best parts of this engaging buddy flick suggest the truly sparkling comedy it might have been, if only it weren't so eager to be ... well, lighthearted and pleasant.

Kevin Costner in The GuardianTHE GUARDIAN

If I were trapped in the middle of a violent storm, and drowning, and being rescued by a member of the Coast Guard, I would hope that my savior was just like Kevin Costner in The Guardian - someone stalwart, sincere, and able to convince me that everything was going to be all right, even when he was shouting at me.

If I'm watching a movie involving this exact same scenario, though, I'm sorry - Kevin Costner is just about the last person I want to see, at least given his performance in director Andrew Davis' Coast Guard drama.