Is Britney preparing for a return appearance?

BRITNEY SPEARS may have found another niche aside from music -- acting! After filming her second appearance on "How I Met Your Mother," it looks like a third guest spot could be in the works, according to The Hollywood Reporter.

CRAIG THOMAS, the show's co-creator, tells THR.com that Monday's episode was written to leave the door open for Spears to make another appearance next season on the CBS comedy.

"She was better than the first time, and I think the fans will enjoy it because her return answers a larger mystery set up earlier in the series," Thomas said.