Bergdorf Goodman where the Olsen twins will be bartending, designers Cynthia Rowley and Peter Som will be competing in a cook-off judged by Padma Lakshmi and Donna Karan and Emmy Rossum will host a game of Fashion Rules.

Need some high-heel lessons? Head to H&M (515 Broadway), where Miss J Alexander of “America’s Next Top Model” will offer personal runway lessons before you strike a “fierce” pose for a shot that will be displayed on a Meatpacking District billboard.

If you’re into ambience, pile on the scarves and gold jewelry for a gypsy caravan-themed fete at Moschino (401 West 14th Street). Shop and gab while fortune-tellers and tarot card readers predict your fashion future (I see studded bags… and shoulder pads).

“Gossip Girl” watchers can see “Little J” Taylor Momsen rock it out with her band The Pretty Reckless at the Teen Vogue block party (Perry Street between Bleecker and West 4th).

Boutique lovers might want to stop by INTERMIX SoHo (98 Prince Street), where sister designers Savannah and Sienna Miller of Twenty8Twelve will sign FNO specialty shirts and host an “Art Battle” in which artists draw on mannequins for the judging audience.

Charlize Theron will sign copies of Vogue’s obese September issue at Dior (21 East 57th), while makeup artists will transform guests before they sit down for exclusive portrait sittings.