A representative for the adult actress claims the busty blonde accepted two free shots from a stranger at a Sin City hotel bar and downed them before leaving the venue with her friends.

However, she collapsed on the pavement shortly afterwards and now Jane believes something had been slipped into her drinks without her knowledge, according to TMZ.com.

The star was taken back to her hotel room, where she woke up vomiting and feeling weak, with little memory of her night out, although her spokesperson insists she is OK.