'History of Rap 6' Justin Timberlake And Jimmy Fallon Perform, Singer Shares New Photos of Baby Boy (VIDEOS)

Justin Timberlake and Jimmy Fallon are back at it! On Wednesday night's episode of "The Tonight Show," host Fallon brought on his good friend Timberlake for the first time in what feels like ages so the two could perform the sixth edition of their iconic "History of Rap." With help from Fallon's house band The Roots, the two comedians rapped their way from Jay-Z, to Salt-N-Peppa, to Fetty Wap, to Nelly, and so many more, proving that they've still got it.

At one point, Fallon, 40, got a little out of hand when he took over rapping "Straight Outta Compton." "Jimmy, we've been through this before," Timberlake said. "You're not straight outta Compton. You're straight out of upstate New York."

The two hilariously completed the bit and reminded us why we long for the days when Timberlake and Fallon are together again. As if watching them perform together wasn't enough, Timberlake, 34, even brought some adorable and never-before-seen photos of his 5-month-old son Silas.

"I still have trouble wiping my own ass!" Timberlake joked to Fallon as the two gushed over being fathers. "It is the most amazing, most beautiful, unbelievable thing that can ever happen to you."

Following the show, Fallon tweeted two of the photos, including one of him smiling while he holds Silas in the air and another of his wife Jessica Biel kissing baby Silas on the cheek.