I have some celebrity address from a private source 9 I do not believe they are listed on this website). The celebrity will NOT mind you sending to them via these addresses. Will trade for UK or US postage.
None have been tested by myself but I will be sending shortly. Let me know which address/es you want.

P!nk
Ben Stiller
Bijou Phillips
Cameron Diaz
Dennis Haysbert
Dr.Dre
Geri Halliwell
James Cameron
Jason Briggs
Joe perry
Kate Hudson
Katie Holmes
Kenny Chesney
Kevin Costner
Matthew McConaughey
Niki Taylor
Nina Dobrev
Paris Hilton
Sandra Bullock
Tiger Woods
Tori Spelling
William Shatner
Zac Efron