Lady Gaga puts Fashion Week to bed as she invites famous friends to watch her sleep, then gets tattoo on back of her head in front of partygoers

Paris Hilton, Marc Jacobs and other celebs watch as Gaga slumbers away in egg/claw installation

Marc Jacobs sticks fingers through egg installation to touch 'sleeping'Lady Gaga at Guggenheim.
Lady Gaga knows how to throw a party.

To mark the end of New York Fashion Week and fete “Fame,” her first fragrance, Gaga invited her famous friends to watch her sleep.

Lady Gaga sleeping and being touched by people at the Guggenheim Museum.

She arrived to the black-tie masquerade around 6:30 p.m.,  bypassing the red carpet where reporters weren’t expecting her for another hour. According to  a source Gaga was fashionably early because she wanted to prepare for her performance art piece, “Sleeping with Gaga.”

Lady Gaga arrives.

Around 9 p.m. she climbed into some sort of  egg/claw combo that allowed partygoers, including Paris Hilton and Marc Jacobs, to stick their fingers through a hole in the installation and touch her as she “slept.”  Gaga emerged from the egg at 9:45 p.m. when assistants stripped her down to lingerie and thigh highs.

She crawled back inside with a tattoo artist who inked a cherub looking suspiciously like Honey Boo Boo on her neck for all to see on a big-screen TV.

Lady Gaga's new tattoo.

Lady Gaga getting her new tattoo on the back of her head, September 14, 2012

Mother Monster has said she wants her perfume to smell “like an expensive hooker,” and said that blood and semen “is in the perfume, but it doesn’t smell like it.”

A covered Lady Gaga and photographer Steven Klein leave the event.

Confidenti@l has learned exclusively that Gaga was very strict when it came to invites for her Thursday night party at the Guggenheim celebrating her foray into fragrance with “Fame.”

Lady Gaga's poster for her perfume launch.

“She personally decided who got the nod for invitations and who couldn’t come,” says an ultra-insider. Although the songstress has been busy with her “Born This Way” tour and a new album, “she’s really hard-working and took this upon herself,” says our source. The party “is important to her.”

Lindsay Lohan attends the Lady Gaga perfume launch.

The fashion-forward few approved for the soiree, hosted by celebrity photographers Nick Knight and Steven Klein (who directed Gaga’s “Alejandro” music video), included Alexander Wang, Rachel Zoe, Alexandra Richards and Yoko Ono.