Celebrity | How I Met Your Mother Encore! Britney Back on Sitcom How I Met Your Mother co-creator: 'We’re all so thrilled' By Sam Gale Rosen Posted Apr 28, 2008 2:55 PM CDT Copied In this image released by CBS, Josh Radnor, left, speaks to Britney Spears, who portrays receptionist Abby, in a scene from "How I Met Your Mother." which aired on March 24,2008. (AP Photo/CBS, Monty Brinton) Britney's back for a second stint guest-starring on How I Met Your Mother. Spears' first cameo netted the show its highest ratings ever, and the new episode began filming today, reports People. “We’re all so thrilled to have Britney joining us once again," says the show's co-creator. Read These Next New Fox star, 23, misses first day after car troubles. Iran's supreme leader makes first public comments since ceasefire. Her blood isn't compatible with anyone else's. Man accused of killing his daughters might be dead. Report an error