On the 100th episode, which will be a musical: It's pure whimsy and fantasy. I think everyone at the show has pretty romantic sensibilities and it's going to be classic, old time Hollywood, good old fashioned musical number.

Read the whole article here (http://www.examiner.com/x-21494-Joss-Whedon-Examiner~y2009m9d6-How-i-met-your-mother-Season-5).

with NPH in the cast, it was an absolute certainty. sigh