Who is Fallon’s biggest competition on Twitter among late night hosts?

AdWeek :: With Letterman out and Jon Stewart soon to follow, all of the talk recently has been about late night. Part of why Letterman is stepping down is because he cannot compete in the viral video arena, while Jimmy Fallon, Jimmy Kimmel, and John Oliver are generating buzzworthy segments on an almost nightly basis.

Read Adam Flomenbaum, www.adweek.com