Model Chrissy Teigen doesn't like to wear underwear. The "Sports Illustrated" swimsuit model revealed her little secret during an episode of E! News "Fashion Police," the Huffington Post reports.

Funny girl and co-host Joan Rivers asked Teigen if she was wearing any underwear while they were taping.

"No!" Teigen laughed. "I should have tested this. I didn't know sitting would be this bad,"

Rivers said the first time she met the model, who is supposed to be marrying John Legend in September, she told her about her no-underwear policy. When asked what she does when she's on her period the outspoken Teigen, who sat with her legs tightly crossed, said she has a trick for that and explained how you simply tuck "the string in your butt crack."

As the co-hosts laughed, the only male co-host of the show George Kotsiopoulos screamed "TMI, TMI!" Not holding back at all, Teigen then explained what some models do when they're on the set of music videos and it includes having an assistant cut the tampon string so it's not visible.

Teigen and R&B singer John Legend got engaged in 2011 and are set to marry in a destination wedding in September. The two have kept the details of their upcoming ceremony quiet but a source told the New York Post that they are planning on tying the knot in Italy because "that's where they fell in love," the Daily Mail reports.

When asked in April where the wedding would be taking place, the model told "Showbiz Tonight" she wouldn't give any details but said they are "going to make people trek somewhere."

After their wedding Teigen and Legend are reportedly going to honeymoon in the Maldives for 11 days because that is where the singer proposed.