As Johnson began her monologue, Timberlake invited himself ... Timberlake was soon joined by his longtime comedic foil Jimmy Fallon, who has long been known for appearing alongside Timberlake ...

11 (UPI) --David Letterman joined Jimmy Fallon during his monologue on The Tonight Show ... and it marked a brief reunion with Paul Shaffer, his former sidekick. Shaffer worked with Letterman ...