LOS ANGELES (AP) -- Britney Spears fans are getting a chance to own a piece of her clothing.

Spears' wardrobe from her guest-starring stint on CBS' "How I Met Your Mother" will be sold at an online auction to benefit the Natural Resources Defense Council, an environmental organization.

The weeklong auction begins Monday night, just after the episode featuring the pop star is set to air. Spears plays a flirty receptionist who falls for the show's main character.

A half-dozen Spears-worn items will be available, including a navy print Juicy Couture dress, a yellow Nannette Lepore dress and a cream Nannette Lepore cardigan with blue flower details.

CBS and the show's producer, 20th Century Fox Television, are sponsoring the auction.