It’s been almost five years since Jimmy Fallon made his talk show debut on Late Night with Jimmy Fallon, taking over the post-Leno spot in Conan O'Brien's absence. At first critics weren’t impressed and expected Fallon to get the boot. But, of course, he shut the haters up by eventually coming into his own and delivering some of the best late night television moments in recent years.

Fallon’s comedic chops truly shine in side-splitting moments like imitating Twilight's always emo Robert Pattinson or channeling his inner Heisenberg for a Breaking Bad parody. If you still don’t believe how much Fallon has done for late night television, look no further than the time he slow-jammed the news with President Obama, or when he busted a move with First Lady Michelle Obama.

Tonight, Fallon's debut as Jay Leno's replacement on The Tonight Show will begin the former SNL cast member's biggest late-night looks yet. To get a sense of where The Tonight Show's about to go, here are 15 classic moments Jimmy Fallon contributed to late night talk show history

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