She follows in the footsteps of burlesque performer Dita Von Teese, who backed the group's last campaign.

Talking about her new role, Fergie said: "I have been a fan of Viva Glam for a long time - I have been following the campaign for years and I think it's a great outreach.

"MAC picks people like RuPaul, Mary J. Blige - people that are a little controversial and aren't afraid to speak their minds. I'm very proud to be a part of it."

MAC Viva Glam supports the Mac AIDS Fund.