*NSYNC Reunites for JC Chasez's 40th Birthday, Look Dreamier Than Ever!

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

The boys are back! The hotties of *NSYNC reunited on Monday night to celebrate JC Chasez’s 40th birthday. Justin Timberlake, Joey Fatone, Chris Kirkpatrick, and Lance Bass, all posed for a pic with the birthday boy.

JT shared the pic on Instagram with his many followers, writing, “JC’s 40th… And, if you don’t know now you know…”

WATCH: Justin Timberlake and Jessica Biel Enjoy Casual Dinner in Malibu – See Their Weekend Style

Chasez is the second bandmate to hit the 40th milestone. Kirkpatrick is 44 while the rest of the crew are still in their 30s.

Though their rivals from the early aughts, The Backstreet Boys, have stayed together and toured, *NSYNC has kept its reunions to a minimum, with Bass even noting (several times) that he wasn’t invited to Timberlake’s 2012 wedding to Jessica Biel.

WATCH: Justin Timberlake Delivers Powerful Message of Hope During Teen Choice Awards Acceptance Speech

In 2013, the group had a 90-second onstage reunion during Timberlake’s MTV VMA Video Vanguard Performance.

"Literally, two minutes after seeing everybody you feel like no time has passed," Chasez told Ryan Seacrest at the time. "Essentially everybody has remained the same and we all see each other at different times … but this was the first time we had a rehearsal together in 10 years, so everyone was going, 'Can we go through this one more time slowly?'… so that part was pretty funny."

Related Gallery