Be still our teenage hearts.
*NSYNC reunited, at least for a night - and we have the picture that proves it.
Former frontman Justin Timberlake shared this heart-stopping picture on Instagram of himself alongside fellow *NSYNC-ers Joey Fatone, Lance Bass, Chris Kirkpatrick and JC Chasez.
The gang were celebrating JC's 40th birthday and Justin added the caption: "JC's 40th... And, if you don't know now you know..."
*NSYNC went on hiatus in 2002 and they haven't recorded new material since, though they did reunite for a one-off performance at the 2013 MTV Video Music Awards.
Oh boys, don't say Bye Bye Bye again.