Can Britney Save Barney?

Britney Spears is doing a guest spot on How I Met Your Mother. This is not the first time Britney's tested the acting waters. Everyone remembers the cinematic marvel that was...Crossroads and her surprisingly funny guest appearance on Will & Grace.

HIMYM (Him-Yim for the abbreviation inclined) is in dire straits. The show finally found a small but reliable fan base and an enviable time slot but it's enough. It's almost April and the show still hasn't been picked up for a 4th season. Will Britney bring enough clout to keep this comedy afloat?

I don't want to put all my eggs in Britney's basket (who knows where its been?) but her guest spot may be HIMYM's last hope. The episode airs March 24.