jwowwpic460new.jpgCourtesy: WireImage

J-WOWW ditched her Jersey Shore castmates for the night .... taking control of the turntables at Jet Nightclub at The Mirage Hotel and Casino in Las Vegas.

The heavily-bronzed reality show starlet, wearing super short jean shorts and exposed black bra, hosted the night filled with house music and plenty of fist-pumping!

An insider tells X17online that J-WOWW was talking trash on Sammi "Sweetheart" throughout the night and of course, boozing it up. We're also told she couldn't stop bragging about her upcoming Playboy magazine shoot. You go, girl!

See the gallery below for more photos of J-WOWW letting loose!