Details On Britney’s 27th Birthday Bash

Britney's celebrating her 27th birthday by hittin up club Tenjune in New York City tonight.

According to Eonline.com, Heidi Klum, Lance Bass and Lipstick Jungle star Rob Buckley are already inside.

Britney, dressed in a "little gray and black dress with 'major cleavage,' says a partygoer," is also currently inside celebrating.

According to an insider, "the place is done up like a circus tent with a hot-dog stand and popcorn and cotton-candy machines emblazoned with the pop star's name. And outside, there's a huge screen projecting circus imagery - even a guy on stilts."

Sounds fun! Hope she enjoys herself!