Jimmy Fallon may not have joined Justin Timberlake to reprise their classic 'Barry Gibb Talk Show' yarn for JT's 'SNL' hosting gig last week, but the duo did appear in a skit together on 'Late Night With Jimmy Fallon' last night (March 14), playing teen versions of themselves while at summer camp in 1983.

With retainers on their teeth and big, curly hair atop their heads, the twosome sing an a cappella version of Toto's 'Africa,' tempting the camp director to come yell at the temp to pipe down since they are singing after "lights out" time.

JT's wig resembled his hair from back in the day, when he was dating Britney Spears. The skit was hilarious, as the boys could not stop themselves from singing Toto's soft pop hit from the '80s.

JT also performed 'Strawberry Bubblegum' from the forthcoming 'The 20/20 Experience' as part of his week-long string of appearances on his friend's late night show to promote the album. He had a bit of a Bruno Mars look with his cap and varsity-like jacket but that falsetto is all JT, and so was the footwork.

See JT as the 'Suit & Tie' expert, talk about the Kanye West diss and perform a barbershop version of 'Sexyback,' all from earlier this week.

Watch Justin Timberlake Perform 'Strawberry Bubblegum'