Sarah's Birthday is an episode of the CollegeHumor show Hardly Working. The show's fans thought that it was a great episode mostly because of Dan's hilarious singing. The episode is currently the fourth most watched Hardly Working video on YouTube after Rap Battle, Airplane and Stomp with 630,000 views.
It's Sarah's birthday and to celebrate, some of the guys at CollegeHumor have decided to throw her a birthday party. Unfortunately, they have forgotten the words to the birthday song, so they try to make their own words up.