LC to Design Lingerie?

Lauren Conrad is a busy girl – along with starring on MTV's The Hills, she's writing a series of Young Adult books, is a spokesperson for Avon's mark line, works for fashion PR firm People's Revolution and is already well into her career as a fashion designer with her Spring 2009 line debuting at Mercedes-Benz Fashion Week recently.

And now she's ready to take her passion for fashion even further.

"I've always wanted to do lingerie," she tells Entertainment Tonight in an interview airing this evening. "I would do a sleepwear line. I love going sleep in something pretty. I like clothes even when I am sleeping!"

As for her ideas for spring, LC says she was inspired just by being a girl.

"I wanted to go girlie," she reveals. "I wanted it to be springy, so we did big floral head pieces, ruffles and constructed volume."

For more Lauren, tune in to ET tonight!