Paris Hilton dismisses break-up reports

US socialite Paris hilton has denied she's split from boyfriend Doug Reinhardt dismissing the rumour as "a ridiculous lie".

US socialite Paris hilton has denied she's split from boyfriend Doug Reinhardt dismissing the rumour as "a ridiculous lie".

The 29-year-old hotel heiress socialite was spotted enjoying a night out in Las Vegas on Saturday with her sister Nicky and Kim Kardashian's ex-boyfriend, footballer Reggie Bush.

According to reports, Hilton was in Sin City with her family after splitting from her boyfriend of 14 months, while Reinhardt had fled to Aspen, Colorado with his father.

"Obviously she broke up with him," a source had said. But Hilton has silenced the speculation with a post on her Twitter page, writing, "Can't a girl have a night out in Las Vegas with her sister, without fake stories being posted. That story is a ridiculous lie. 100 per cent false."