Justin Timberlake was 17 in *NSYNC: *N the Mix when he played the character 'Himself'.
That was over 25 years ago in 1999.
Today he is 43, and has starred in 72 movies in total, 67 of those since *NSYNC: *N the Mix was released.
In *NSYNC: *N the Mix, I think Justin Timberlake looks: