'How I Met Your Mother' Celebrates 100 Episodes

Neil Patrick Harris, Jason Segel and Alyson Hannigan of "How I Met Your Mother" celebrated the 100th episode of the hit sitcom at the Paley Center for Media in Beverly Hills.

See photos of more hot and humorous stars

Check out this hysterical raw Flipcam footage from the red carpet!

The 100th episode airs Monday on CBS.