New toxic television star Britney Spears is in talks to visit again her highly rated and guest starring role on the CBS sitcom How I Met Your Mother, according to reports. TV Guide cited multiple sources as saying producers are seeking her return for at least one more episode as a dermatology office assistant named Abby, who falls for the shows lead character, Ted, played by Josh Radnor. The report quoted one insider as saying, "It all depends on her availability. "CBS and the studio that produces the show, 20th Century Fox Television, declined to comment on the report. Spears appearance on the show last month drew 10.6 million viewers,way up from its season-to-date average of 7.8 million, according to Nielsen Media Research. Her performance also elicited mostly positive reviews, providing the singer with a rare bit of upbeat publicity amid a torrent of marital, health and legal woes in recent years. And she said in a statement issued weeks ago while shooting her scenes that she was "having a blast".