They're baaaaccccckkk!
Justin Timberlake joined Jimmy Fallon for another installment of "The History of Rap" on "The Tonight Show" on Wednesday -- and this edition was even better than the last.
From “Hammertime” to “Summertime,” and “Informer” to “Ignition,” the dynamic duo moved from one era of hip-hop to another, rapping, singing, and dancing their way through decades of rap history.
Fallon did a convincing impersonation of Slick Rick's rhymes in “La Di Da Di” and went all out for “Straight Outta Compton” by N.W.A.
Timberlake welcomed some newer acts by covering “My Way” by Fetty Wap before his pal dug deep for “Bugatti” by Ace Hood.
Check out the hilarious clip above!
After the "Mirrors" crooner showed off his rap skills, he couldn't help but gush about his baby boy, Silas.
He even shared new photos of his 5-month-old son with Jessica Biel. One pic showed the little one smiling at the camera with his proud papa. Another photo, taken after a bath, showed Jessica kissing Silas on the cheek as he was wrapped in an elephant towel.
"It is the most insanely, amazing, most beautiful, unbelievable thing that could ever happen to you," Justin said about fatherhood.
Can he get more adorable?!
There was even more fun on Fallon last night -- Ellen DeGeneres went head-to-head with the late night host in an epic Lip Sync Battle.
Jimmy kicked things off with an incredible performance of The Killers' "Mr. Brightside," but Ellen held her own with a hilarious rendition of "Do You Know Where You're Going To" by Diana Ross.
Fallon tried to win back the crowd -- and his buddy Justin's vote -- with the contemporary choice "Watch Me" by Silento. He wowed the audience, but Ellen came out swinging with Rihanna's "Bitch Better Have My Money."
You've gotta see these two in action above!
