Paris Hilton's worst moment was when her dog vanished.

The hotel heiress - whose sex tape with ex-boyfriend Rick Salomon was leaked in 2003 and who spent 23 days in prison for driving with a suspended licence in 2007 - struggled to cope when her prize Chihuahua Tinkerbell went missing.

The 28-year-old star insists her life is far removed from what many people think, but admits she only goes to parties she is paid to attend.

Paris explained to Tatler magazine: "I'm a brand. I'm a businesswoman. I do everything - I act, I sing, I design, I write books. What I love the most is the business part. I like what it is leading to. I eventually want to get involved in real estate."