Jimmy Fallon officially took over “Late Night” from Conan O’Brien (who is taking over “The Tonight Show” from Jay Leno) last night and his debut wasn’t off to a bad start. He had superstars Robert DeNiro and Justin Timberlake as guests on the show. Highlights of the show featured Fallon about to go onstage as he ran into O’Brien packing up his things. Then DeNiro came out and Fallon gave his best DeNiro imitation as DeNiro then imitated Fallon. Finally Timberlake came out and plugged his new reality series. Fallon did well on his first night and seemed very natural in the position, hopefully he can take it over for another decade as O’Brien did before him.