Earlier this week, Britney was looking better pulling on her brown boots and puffing away on a cigarette outside her house. We were so excited to learn that Britney is going to make a guest appearance on one of our favorite shows, How I Met Your Mother — and we're even more glad to hear how well things have been going on the set this week. Apparently Britney has been nothing but professional, and she's having a fabulous time. She said, "Working at How I Met Your Mother has been so terrific. Everyone, including the cast, the crew, and the producers, has been wonderful and Abby is such a fun girl to play. I'm having a blast!" As the icing on the cake, the castmembers Alyson Hannigan, Jason Segel, and Neil Patrick Harris can't seem to stop singing Britney's praises! Maybe they can make it into a recurring role?