When Zac Efron grows up, he wants to be Matthew Perry. Or can’t avoid it. Or something. Either way, Efron’s latest comedy has Perry shrinking down to Efron in a very Big/Vice Versa/Freaky Friday sort of way. The good-natured comedy might have already been done in a zillion variations, but the basic plot concept still has firepower at the box office, as the flick drew a respectable $24 million over its opening weekend.

That was followed by State of Play with $14 million, while Monsters and Aliens, Hannah Montana the Movie, and Fast and Furious all lingered somewhere in the $12 million range to round out the top five. The heavily-promoted dark comedy, Crank: High Voltage, was about as appealing to moviegoers as a triple-dose of Colonix, which drew only $6.5 million to take a very distant sixth place in its debut weekend.

Next weekend should be better, with the thriller Obsessed looking set to dominate, but the real start of the summer movie season comes on May 1, when X-Men Origins: Wolverine debuts, followed a week later by the J.J. Abrams version of Star Trek. Those are the ones I’m waiting for!