MAC Viva Glam Gaga Lipstick (Lady Gaga Lipstick)
MAC describes this lipstick as a cool-blue pink shade. It's great and I think it would be wonderful layered over other lipsticks as well (if it's not opaque enough for you). At first I thought it might be similar to MAC California Dreamin' but I find this Viva Glam lipstick to be a bit more full coverage (though not totally) and more vibrant, less subdued.
This is limited edition, get yours while you can and help support the fight against AIDS/HIV. This shade sold out quick at first, I had to preorder it and then pick it up a few weeks later. Ah, I am really liking creamy pink lipsticks like this right now.