Lady GaGa did her bit for charity in a very lacy number last night.
The singer took part in an An Audience with Lady GaGa and Cyndi Lauper, which saw the stars engaging in a discussion about HIV and AIDS to raise awareness for the MAC AIDS Fund.
Led by Sharon Osbourne, MAC partnered with Ustream to broadcast the event to an audience via their Facebook page.
Other stars attended the event, including model Agyness Deyn and her pal Henry Holland.
But all eyes were, surely, on GaGa in her see-through bold-shouldered attire with her dramatic black mask and headpiece.
By Ruth Doherty