Its the biggest supermodel head-to-head since “Zoolander.” Reigning Victoria’s Secret top girl Miranda Kerr is for the first time hosting a big New York Halloween bash — battling former VS queen Heidi Klum, whose annual Manhattan party is on the same night.

Klum, famous for her over-the-top costumes, will be at PH-D at the Dream Downtown on Monday, after throwing a bash at Tao in Vegas.

Meanwhile, Kerr, dressed as a sexy ringmaster at new Meatpacking hot spot Catch Roof on Monday, will be doing her utmost to outshine Klum, who handed Kerr her wings as Victoria’s Secret’s top model when she retired from the catwalk show last year.

PHOTOS:

MIRANDA KERR

HEIDI KLUM

KLUM VS. KERR

CELEBS IN COSTUME

Stylist and model expert on new E! show “Scouted,” Dani Stahl told us, “This Halloween will be the ultimate ‘who wore it best’ — a true costume throwdown.” Referencing Ben Stiller’s 2001 comedy, she added, “Not since rival supermodels Zoolander and Hansel squared off in ‘Zoolander’ has there been such an epic supermodel battle. Models are always in competitive mode to get the job and be No. 1.”

Australian beauty Kerr will host a circus-themed bash for 200, dressed as a 1940s ring- master, “whip and all,” we are told.

Klum, who has hosted Halloween parties for 10 years, is going for a scary look and has been spotted at the office of her dentist, Dr. Gregg Lituchy, getting custom-made fangs. A source told us, “Heidi has had fangs molded that will be attached to her teeth on Monday. She takes this very seriously.” Klum, also hosting an online virtual costume party for Unicef, told us, “I’m a triple threat this year!”

Meanwhile, another woman well-known for her body of work, Kim Kardashian, is hosting the Midori Green Saturday night Halloween soiree at Lavo. And she’ll be stepping out in a Poison Ivy costume, we’re told.

Model Halloween parties have been a tradition since Naomi Campbell’s wild and glam bashes of the late ’90s with fellow supermodels Kate Moss and Linda Evangelista.