PARTIES PARTIES PARTIES (with or without panties):

* Mercedes-Benz Fashion Week kickoff
Where: The Box, 189 Chrystie St., nr. Stanton St.
When: February 1, 9 p.m.
Who: Mena Suvari, Nick Cannon, and L.A. band Shiny Toy Guns.

* Vionnet launch
Where: Barneys New York, 660 Madison Ave., at 61st St.
When: February 2, 6 p.m.–8 p.m.
Who: Everyone. Victoria Bartlett, Gilles Bensimon, Phillip Lim, Olivia Chantecaille.

* Rock & Republic after-party
Where: Hiro Ballroom, the Maritime Hotel, 371 W. 16th St., at Ninth Ave.
When: February 2, 10 p.m.
Who: Mark Ronson, designer Mark Ball, and a gaggle of catwalkers. Lady Sovereign will perform at midnight.

* Marc Jacobs after-party
Where: Eugene 27. W. 24th. St., nr. Fifth Ave.
When: February 5, 9 p.m.
Who: The Olsens, Jessica Stam and every model worth looking at.

* Heatherette after-party
Where: Roseland Ballroom, 239 W. 52nd St., nr. Broadway
When: February 6, 10:30 p.m.
Who: Lydia Hearst, Tinsley Mortimer, Amanda Lepore, and Paris Hilton.