What do Britney Spears, Heidi Montag, and Spencer Pratt have in common? After January, all three celebs will have guest starred on How I Met Your Mother. Our fave dramatic Hills couple will follow in Brit's footsteps and play versions of themselves on the hit show. "Heidi and I are honored to be part of such a successful show," Spencer tells Us Weekly. "I don't want to give anything away... but I'm the Mother."

Speidi has tough shoes to fill, though. It was announced on Monday that Brit was nominated for a People's Choice Award for her role on the show earlier this year. She starred as a dorky receptionist in two episodes, and on her first appearance, she helped the show win its highest ratings ever. Think Speidi can win any awards? Maybe. Brit was nominated for Favorite Scene-Stealing Star! That's a category that isn't so foreign to Speidi...