As always, Jimmy Fallon's "Tonight Show Starring Jimmy Fallon" is a surprise. Last Wednesday, it was the singer-songwriter, Justin Timberlake fell on his show's hilarious guesting. Timberlake appeared on the late-night show to promote Trolls, which will hit theaters next week.

But of course, the show won't be complete without Timberlake presenting a 'Timberlake' performance. Remembering their most usual performance, the two broke out with performing with memorable songs. The two then performed "Ironic" of Alanis Morisette. Among other unforgettable TV moments was the "History of Rap".

Like old-long-lost friends, the show went on in a full fun night. And to prove their friendship, the two played the "Best Friends Challenge."

One of the moments they flashed back and precisely answered was their favorite mode of transportation, which the answer was quite unbelievable, "tandem bike", which was the song they often sing  together is "Keeping Your Poop In a Jar."

Timberlake and Fallen also didn't miss to amuse the viewer when they recalled their camp kids characters in another "Camp Winnipesaukee" skit, where the two debuted a few years ago, with the two playing younger versions of themselves at sleep-away camp. Two camp sketches that aired on "Late Night" in 2013 have reached up to more than 6 and 12 million views on YouTube, while one with Timberlake and Fallon as campers from 2014 has been watched nearly 8 million times.

The singer superstar also talked about how he voted early "super quiet," in case no one heard. He, however, encourage everyone to vote, but added, "Don't take a picture of yourself." Formally, the show went on in discussing Timberlake's new film Trolls and showed a clip from the movie. He also promoted the movie to be watched in 3-D that will surely blow the viewer's mind. Fallon's show being odd, the late-night host invited the singer with a pizza talk and invited, of course, the audience.