Paris Hilton's worst moment was not when her sex-tape was made public in 2003 or when she served 23 days in prison for driving with a suspended licence.

The heiress has revealed that her worst moment was when her prize Chihuahua Tinkerbell went missing.

Hilton was terrified for a week: "It was so scary she was gone for a week and I wasn't sure if she'd ever come back. It was like losing a child. She was a couple of blocks away at an old lady's house. The lady didn't watch TV so she didn't know my dog was missing. Then she saw the sign and I got her back."

Hilton insists that she leads a normal life but she only goes to parties she is paid to attend.

Paris recently told Tatler magazine that she's a brand. "I'm a businesswoman. I do everything ? I act, I sing, I design and I write books. What I love most is the business part. I like what it is leading to. I eventually want to get involved in real estate."