Jimmy Fallon celebrated five years hostingThe Tonight Showwith a special episode featuring a slew of celebrity guests.
Finally, Oscar-winning actor Robert De Niro storms off theTonight Showset after spotting cockroaches during filming.
The Tonight Show Starring Jimmy Fallonairs weeknights at 11:35 p.m.

Credit: Andrew Lipovsky/NBC
ET / 10:35 p.m. CT on NBC.
Watch the best moments from Fallons five-year hosting anniversary above.