(PORN VALLEY, CA) — The MTV Video Music Awards turned into a red-hot, all-girl smooch-fest last night as Madonna, Britney Spears and Christina Aguilera performed a raunchy, bump-and-grind dance routine that ended in explicit, open-mouth kisses.

In the eye-popping opening number, Britney and Christina wiggled onto the stage in white bustier wedding dresses and warbled “Like a Virgin,” just as Madonna did on the 1984 MTV awards show.

Then the Material Girl herself sashayed out and began gyrating between the curvy cuties in a black, skintight, Marlene Dietrich-style outfit, singing her smash “Hollywood.”

The tantalizing trio did some pulse-pounding booty bouncing that had them giggling like mad – then Madonna and Britney suddenly grabbed each other and enjoyed an up-close-and-personal kiss that lasted several seconds.

Not to be outdone, Christina moved in for a mini-makeout session, planting a big wet one on Madonna’s lips and making the turned-on crowd at Radio City Music Hall go berserk.

In case you wondered, eyewitnesses in the first few rows told The Post, “There definitely was tongue.”

Dave Navarro of the Red Hot Chili Peppers took a curt shot at the two younger pop tarts, remarking, “Madonna looked younger than both Britney and Christina.”

It was a wild beginning to an electricity-charged show that saw Beyoncé walk away with three “Moonmen” statuettes for her video with her beau, Jay-Z, “Crazy in Love.” It took best female video, best R&B video and best choreography.

Justin Timberlake, who dates Cameron Diaz, proved his luck just won’t run out by walking away with best male video and best pop video, for “Cry Me a River,” and best dance video, for “Rock Your Body.”

While nobody could beat the Madonna-Britney-Christina menage a trois, 50 Cent tried with a hot performance of “P.I.M.P.,” along with Snoop Dogg, Bishop Don Magic Juan and a heart-stopping posse of half-naked women.

Earlier, Snoop Dogg entered the auditorium with two women who wore dog collars around their necks, attached to leashes.