Britney Spears’ episode of “How I Met Your Mother” will be airing tonight and the clothes she wore in the show will be auctioned off to benefit the National Resources Defense Council.

At least six items that the pop princess wore will be auctioned which will begin right after the episode airs.

The sale, which is being sponsored by the producers of the show, will include a navy print Juicy Couture dress, a yellow Nannette Lepore dress and a cream Nannette Lepore cardigan with blue flower details.