Nicky Hilton is addicted to online gambling, specially to Blackjack , and says it helps her sleep. The sexy socialite and model, who runs two successful businesses, spends sleepless nights playing cards on the internet.

She said: "I love online gambling. At night, when I can't sleep, I play blackjack online until I get tired or lose my money."

Meanwhile, Nicky has confessed she is a complete slob.

The brunette beauty claims she doesn't spend time worrying about the way she looks and never takes longer than half an hour to get ready.

The 21-year-old told Britain's Maxim magazine: "I'm pretty low maintenance in every way. It takes me about 25 minutes to get ready to go out. I'm very happy being a slob."

Nicky and Paris Hilton are both heiresses to the Hilton hotel chain fortune.