"We're good," she said Saturday night when asked how things are between the two of them, while giving a thumbs up.
The starlet seemed in high spirits as she celebrated her 22nd birthday at Las Vegas's Pure Nightclub. With her BFF's Ashley Tisdale and Brittany Snow with her, Hudgens was seen dancing on a couch at her VIP area inside the club. (Efron did not attend).
Earlier, she posed for a few fan photos while being presented with a three-tiered floral birthday cake. Shortly into the night, curtains were closed around her table, providing her group with privacy.
Though her year is ending with her split from Efron, Hudgens told PEOPLE that 2010 was a "good year".
"I worked a lot in 2009. I did two movies back to back, so this year I just hung out, took it easy, did a play which was a lot of fun, did a movie and now the year is coming to an end before I know it."
Donning a silver metallic dress by Pleasure Doing Business, the Sucker Punch actress said she has no New Year's resolutions, but she anticipates 2011 will be very busy – at least professionally.
"It's going to be a very, very busy year," she said. "I have three movies coming out in the next year, so I'm excited to see what the future is going to hold."