Showbiz
REX
The US socialite signed up for the trip in September, but has now claimed that she is worried about swapping her partying lifestyle for humanitarian work.
She told Newsweek: "Before, my life was about having fun, going to parties - it was a fantasy.
"But when I had time to reflect, I felt empty inside. I want to leave a mark on the world."
Hilton added: "I'm scared, yeah. I've heard it's really dangerous. I've never been on a trip like this before."
More: Showbiz
More Showbiz News
Ten Things About...
Ten Things About... Ridley ScottWe find out ten fast facts about the English producer and director.
Interviews
'Angels' Share' Ken Loach interviewKen Loach, Paul Laverty and Paul Brannigan on their whiskey-soaked comedy.
Fashion & Beauty
Duchess of Cambridge's memorable momentsFlick through a gallery of Kate Middleton's stand-out public appearances.
Celeb Birthdays
Marilyn Monroe: Life and career in picsFlick through our gallery on what would have been Marilyn's 86th birthday.
