Nicole Richie set to marry?

Richie and girlfriends spend hen-style week-end in Mexico

Nicole Richie was spotted in Mexico with a group of girlfriends including Christina Aguilera, DJ Samantha Ronson and her twin sister, fashion designer Charlotte Ronson.

It was first thought the group was celebrating Richie's 29th birthday, which falls on the 21st of September, but later Lionel's daughter was seen wearing a robe with "Tickle your chi chis with Miss Richie" written on the front, "Nicole's bachelorette" and the date 17 September 2010 written on the back. She later sported a bride-to-be sash.

Richie and Good Charlotte singer Joel Madden have two children, 2-year-old Harlow and 1-year-old Sparrow.
The couple announced their engagement at the beginning of the year and are expected to tie the knot this week-end in Malibu.