Heidi Klum Explains Over-the-Top Halloween Costume

Like she does every year, Heidi Klum went all out for Halloween, dressing as an 8-foot-tall robotic superhero for her annual bash with husband Seal.

Klum, 37, dished all about her duds - designed by Martin Izquierdo, known for creating the famous Victoria's Secret angel wings -- to UsMagazine.com.

"I wanted to be like an alien transformer," she told Us at the party at NYC's Lavo (where guests sipped on ABSOLUT Bloody cocktails). "It took a few hours [to get ready], but I was well-prepared because someone has been building it for me for quite some time, so when the time came, I just put it on. But the makeup, that took a little while longer!"

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She told Us it wasn't even difficult walking in such an outrageous getup (which had built-in stilts, by the way). "I practiced a few times ... it's not that hard!" she said.

Her only concern? "I can't really bend anything!" she told Us.

As for husband Seal, 47, she told Us, "He did not want to be on stilts, so he thought, 'OK instead of height, I’m gonna go wider. So he wanted to be the Silver Surfer."

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Their children didn't get to see their final costumes because they're in Los Angeles.

"I said to my husband that we’re going to have to redo this again one more time for them when they get home because they want to see — especially the boys!" Klum told Us.

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Their children all had eclectic looks themselves, she added.

"I have a little princess, a witch, a Superman and a Dracula," she said. "They love it! If it was up to them, we’d go to a pumpkin patch everyday, and they would wear costumes everyday. They would keep the spiders, hanging in our house for the rest of the year. They just love it!"

Added Klum, "Everyone is great!"