Watch the Cast of ‘HIMYM’ Do Letterman’s Top 10 List

David Letterman trotted out the cast of How I Met Your Mother last night to compete against Jimmy Fallon’s Tonight Show debut. Here’s the show’s stars, Josh Radnor, Alyson Hannigan, Colbie Smulders, Jason Segel, and Neil Patrick Harris, doing Letterman’s Top 10 list.

Watch the Cast of ‘HIMYM’ Do Letterman’s Top 10 List