A mysterious tape arrives for Barney from one of his numerous ex-girlfriends, and the entire gang watches it. But, in order for them all to find out how she broke Barney's heart and made him into a suit-wearing bachelor, everyone must share their most embarrassing moment.
Elenco: Cobie Smulders , Josh Radnor , Neil Patrick Harris , Alyson Hannigan , Jason Segel , Bob Saget , Britney Spears , Candice Accola , Cristin Milioti , David Henrie , Lyndsy Fonseca .