Yes, you guessed. “The House Bunny” really is about the Playboy Mansion and the hot playmates. What you don’t know is that the movie depicts at one fell swoop two extremely different worlds, completely opposite, as one might say: the Playboy world and an ordinary college campus. Students vs. sex stars. Uhm… that sounds interesting, I’d say.

It may be just a dumb-old blonde comedy, but it’s startlingly hilarious. It’s one chance in a lifetime to get to see Anna Faris’ surely-to-become-famous “I’m shocked” expression. Her Shelley Darlington persona may be shocked when she receives an enormous cake for her birthday, but you can’t miss the flabbergasted look on the bunny’s face when she receives a similarly enormous letter through which she’s “violently” kicked out of Hefner’s Mansion for being too old. Poor thing… she’s only 27, but a Playboy seems to shout from the rooftops: “That’s 59 in Bunny years!”

It may seem ridiculous, but a 27-year-old no more belongs in the Playboy paradise. What’s for the retired beauty to do now? Help the socially and cosmetically challenged, of course. Fortunately for Shelley, she meets the Zeta Alpha Zeta sorority members, led by Natalie (“Superbad’s” Emma Stone), whose tedious, isolated lives and lack of knowledge upon the art of makeup and men offer the ex-playmate a new goal in life. She can use the little that she knows to help both the unpopular girls and herself, to find a place to live.

It may sound familiar, since the scenes much resemble the ones in “Legally Blonde,” but the explanation is that the screenwriters, Kirsten Smith and Karen McCullah Lutz, wrote both stories.

Nevertheless, “The House Bunny” has a charm of its own, since the sorority creatures are in desperate need of “adjustment.”

Joanne, played by Rummer Willis, wears an unsightly body brace, while Lilly (Kiely Williams) has never spoken and Harmony (Katharine McPhee) is pregnant. If the latter hadn’t carried a child, you would have definitely asked yourselves if they had ever got out of the house. Or maybe Harmony got pregnant in that very same house. Who knows? Anyway, Shelley rushes to save the day and obviously comes with the must-know tips about guys, extreme makeovers, and all the girlish stuff she has ever gained knowledge of.

However, it’s the former playmate’s time to learn a lesson. She dates one of those rare, atypical actually, good-guys, Oliver (Colin Hanks), but she can’t have a normal relationship with him. Her superficial advice only worked on playboys, not on nice and intelligent men. So the now-great-looking sisters have to lend Shelley a hand and teach their mentor about self-respect. It’s really amusing to see the former Playboy hottie holding a book in her delicate pink-nailed hands. And the exchange of knowledge between the girls is side-splitting.

Anna Faris brings an adorable naturalness to the movie and a sweet drop of naiveté to her big-eyed short-minded blonde persona. In spite of the script’s minuses and the sluttish-like wardrobe of the characters, “The House Bunny” is really appropriate as a late-summer comedy and it will be interesting to observe whether it will appeal to other gender and age segments than its young female target.