Rachel Weisz and Ryan Reynolds in Definitely, MaybeDEFINITELY, MAYBE

If anyone's keeping track, writer-director Adam Brooks' Definitely, Maybe is the third romantic comedy of 2008 to climax with its protagonist taking a hasty cab ride to an inevitable romantic clinch and subsequent Happily Ever After. And that's about the only conventional element in it. I'm a little staggered by just how wonderful this movie is, as nothing about the film, from its cutesy setup to the presence of leading actor Ryan Reynolds, appeared to suggest anything more than the latest spin on a tireless (and, by now, tiresome) genre. Yet Definitely, Maybe is sensational, so smart and witty and refreshingly grown-up that, hours after seeing it, you may still find yourself in a great mood; the only times I stopped smiling at the movie were when I was laughing out loud.

Jodie Foster in FlightplanFLIGHTPLAN

Movies such as Flightplan are hell to review. How do I explain, exactly, why the film doesn't work without giving away the plot secrets that prevent it from working? Like last fall's already-forgotten The Forgotten, director Robert Schwentke's airborne thriller involves a missing child. During a trans-Atlantic flight from Berlin to America, Jodie Foster's newly widowed Kyle lays her six-year-old daughter Julia (Marlene Lawston) down for a nap, falls asleep herself, and wakes to find the girl missing. Obviously, escape from the plane is impossible, but Julia is nowhere to be found, and, more disturbingly, no one on the flight seems to remember her being aboard. Could Julia have merely been a figment of Kyle's imbalanced imagination?

Lindsay Lohan, Amanda Seyfried, Lacey Chabert, and Rachel McAdams in Mean GirlsMEAN GIRLS

Recently, some friends introduced me to the considerable pleasures of Freaks & Geeks on DVD, and I understood why the show barely lasted a season; it was a nearly pitch-perfect rendering of high school's everyday horrors and comic humiliations, and what mass audience, hoping for mindless entertainment, wants to subject themselves to that? And just like that sublime TV series, Mean Girls, the new teen comedy directed by Mark Waters and written by Tina Fey, is so wickedly sharp and achingly funny that its target audience probably won't know what to make of it.(At the screening I attended, everyone laughed like hell at the overt physical comedy, but the movie's most hilarious dialogue fell on deaf ears.)

Jamie Lee Curtis and Lindsay Lohan in Freaky FridayFREAKY FRIDAY

Everyone I know has enormous fondness for the 1976 Disney comedy Freaky Friday, wherein mother Barbara Harris and daughter Jodie Foster switched bodies and discovered, on one very strange day, how the other half lived.