Nicole RIchie was spotted landing in Los Angeles yesterday, September 20 following a bachelorette party in Cabo San Lucas, Mexico.
Christina Aguilera revealed the purpose of the weekend with her t-shirt that said "Tickle your chi chis with Miss Richie" on the front and 2Nicole’s Bachelorette 09/17/10" on the back.
source: celebrity gossip, xtina-web