Twitter handle: @ConanOBrien
Date joined: Feb. 24, 2010
Followers gained in 24 hours: 200,000+
The former Late Show host needed little assistance drawing a huge Twitter crowd, pulling in more than three times the number of followers than nemesis Jay Leno. If heâ€™s not expressing his unflappable sense of humor, heâ€™s tweeting exclusives like the first official photo from the Arrested Development movie set.