Forget Britney this is what How I Met Your Mother is all about! You gotta love that Neil Patrick Harris was willing to spoof Doogie Howser on HIMYM, a character that is nothing like the one he is playing now on the show. The only thing they have in common (besides NPH) is that Doogie was a doctor and Barney likes to play doctor!
Another legne-wait for it-dary moment on HIMYM.