How do you know when you've made it in entertainment?
When you appear on The Late Show with David Letterman to read a Top 10 list and the host totally pretends to know who you are.
That's what befell the cast of How I Met Your Mother last night, as the core four stopped by this CBS talk show and read off the Top Ten Surprises In The Final Episode of How I Met Your Mother.
SPOILER ALERT: Stop reading now if you don't want to know the father of the baby and the fate of MacLarens.
NOTE: You can catch up when you watch How I Met Your Mother online at TV Fanatic. Enjoy!