Nicki Minaj and Ricky Martin are a match made in lipstick heaven in the new ads for M.A.C's Viva Glam initiative. The colourful campaign, which was shot by David LaChapelle in Miami this past summer, features Minaj posing on a retro motorbike and Martin foisting an oversized lippie over his head.

Viva Glam is M.A.C wildly popular and charitably minded lipstick and lipgloss range that raises money for the M.A.C AIDS Fund, which supports AIDS and HIV initiatives in under-served communities. Past spokespeople have included Mary J. Blige, Ru Paul, Elton John and Lady Gaga. 

Minaj is known for her brightly coloured makeup looks and while her & Martin's Viva Glam shade hasn't been officially revealed, we're guessing it's the candy-floss pink the hip hop artists lips. (And in that giant tube.) The next Viva Glam shade hits stores in February 2012.

Update: The two pop stars debut their new picks for M.A.C Cosmetics: a bold pink lipstick for Nicki Minaj ($18) and lip conditioner for Ricky Martin ($18), with 100% of proceeds going to the M.A.C Aids Fund. The two-piece line arrives February 15.