• Share
  • Tweet
  • Share
Justin Timberlake, Jimmy Fallon, The Tonight Show

Andrew Lipovsky/NBC

This is the friendship that keeps on giving. 

After years of moments together at Camp Winnipesaukee, Justin Timberlake and Tonight Show host Jimmy Fallon returned once again to the summer camp Wednesday night, though the timing seemed a bit peculiar. 

"Why are we at summer camp in the middle of October?" the singer joked.

Nevermind that. It was time to talk Halloween costumes. Was Timberlake dressing up as Steve Urkel? No. Zach Morris? No. Blossom? Yes!

Next, it was time for a hushed sing-along. This year's musical selection was Alanis Morissette's "Ironic." The men fought off laughter as they made their way through the '90s classic, though the performance was soon interrupted by their fateful counselor, Mr. Fletcher, who scolded them to get back to bed. 

Though the campers agreed to go to sleep, that didn't last long. After resuming the song, Fletcher cut off their fun once again and returned to the bunk to scold the boys and take away their snack shack privileges. 

However, Timberlake and Fallon had the last laugh when they squirted Fletcher in the crotch with a water gun. "Hey Mr. Fletcher, did you pee your pants?" Fallon quipped.

Before the pals begrudgingly went back to bed once more, they had to ask each other an important question. 

"Hey Jimmy—best friends forever?" Timberlake asked. "Best friends forever," Fallon confirmed. 

All together now: it's like raaiinnnnnnnn...

(E! and NBC are both part of the NBC Universal family.)