Don't say oops -- because it's no accident that Britney Spears may return to How I Met Your Mother. The pop star's recent guest stint scored the CBS series its highest ratings ever, and yesterday TV Guide.com reported that producers want her to reprise her role as a dermatology office assistant named Abby, who falls for the show's lead character, Ted (Josh Radnor). "It all depends on her availability," an insider told TV Guide. Watch Spears in the ratings-busting episode "Ten Sessions" by clicking here, and catch the latest episode of HIMYM here.
