Vanessa Hudgens Has Girls Night Out After Zac Efron Split

 Denise Truscello/WireImage

Vanessa Hudgens doesn't appear to be too heartbroken over her recent split from Zac Efron.

When the Sucker Punch actress celebrated her 22nd birthday at Pure Nightclub in Las Vegas Saturday, her BFFs Ashley Tisdale and Brittany Snow vowed to make it an unforgettable weekend.

"Vegas baby. VEGAS! I have a lil' feeling this is gonna be one crazy trip," Snow, who split form beau of two years Ryan Rottman in November, tweeted. "Work hard, play hard!"

"They're my best friends," Hudgens told "I got to have my girlfriends."

Swapping her typical boho style for a slinky Pleasure Doing Business bandage dress, Hudgens was all smiles as she and her girlfriend dined on cupcakes from Social House earlier that evening.

So what caused Hudgens to split from Efron, 23, her love of five years?

Sources tell the new issue of Us Weekly (on stands now) that the former Disney stars grew restless as they grew up. "He wants to put his whole High School Musical past behind him and be known as a sexy solo actor like Leonardo DiCaprio," says the Efron insider. "He was ready to experience life as a single man."

Though sources close to the couple haven't ruled out a reconciliation, Hudgens clammed up when Us asked if she's still in touch with Efron.

"We're good," she said before walking away.

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