For Heidi Klum, no dress is too short to wear on TV.

After taking a seat on The Ellen DeGeneres Show Friday, she asked the daytime talk show host, "Are you peeking?" Ellen DeGeneres teased her guest for picking such a sexy mini dress, asking, "Did you test that dress out before you came out? Did you sit in it before you came out here?"

"I did," Klum said. "Why?"

"It's short," DeGeneres said. "That's all I'm saying."

Klum admitted she looked leggy in her LBD, but said she took the proper precautions. "I put your underwear on under it that you put in my dressing room," she said. "I always wear mine."

Then she decided to flash the audience.

"You guys wanna see it?" she asked.

After readjusting her dress and taking her seat, Klum explained, "I was like, 'This dress is a little too short.' Thankfully, in your goodie bag, there were your shorts." DeGeneres replied, "It looks good with that dress. That's the kind of underwear I suggest you wear under a dress like that."

The conversation then turned to the eleventh season of America's Got Talent on NBC. Klum is returning to the judges' table, while Simon Cowell will be filling the seat Howard Stern vacated. "I'm very sad that Howard is gone," Klum said, adding, "As annoying as he sometimes could be...he was also so much fun, and I actually enjoyed [working with him]." She also asked what it was like to work with Cowell, as he and DeGeneres were judges on Fox's American Idol in 2010.

"Simon is, uh...He's gonna be interesting to work with," DeGeneres said.