Britney Spears was spotted taking a break from her normal routine of shopping and dancing with a visit to Fox studios today. She wasn't just there for a tour, however. Instead she was there to film a guest spot for How I Met Your Mother. Apparently her agent thought that this would be a "a small legitimate project that will keep her busy doing something." Perhaps she was inspired by her sister's upcoming sitcom spot? The news was first reported by our friend Pink is the New Blog and as huge fans of the show, we can't wait! As Barney would say, it's going to be Legen-wait for it and I hope you're not lactose intolerant because the next part is-dary!