Lady Gaga, Sharon Osbourne and Cyndi Lauper Photo: Courtesy of M.A.C.

M.A.C. held an event with Lady Gaga and Cindy Lauper in London on Monday to celebrate the launch of its newest Viva Glam lipsticks.

The ladies were part of a panel moderated by Sharon Osbourne, who posed questions submitted by fans via Twitter and Facebook. The discussion was meant to raise awareness about HIV and AIDS prevention as well as safe sex practices and abstinence, and luminous attendees included bold faced Brits like Henry Holland, Agyness Dyen, and Todd Lynn.

The event was streamed to M.A.C.'s Facebook page, and can be watched there now by clicking on the Ustream tab. Or, watch the event on Ustream's website.

Both ladies gave sound advice at the event, reports WWD.

"Even Lady Gaga can be celibate. It's OK not to have sex," said Lady Gaga. "You don't have to have sex to feel loved."

"Don't be a knucklehead," said Lauper. "Spread the word, not the disease."

Lady Gaga's Viva Glam shade is pink, while Lauper's is a coral-y red. The ladies will appear in an ad campaign shot by Ellen von Unwerth. The shades are available online and on counter for 12 months, so catch them while you can.