Pop
Nsync has several music DVDS. The official Nsync music DVDS include "Nsync - PopOdyssey Live (2001)" and "Nsync - Live from Madison Square Garden (2000)."
No but he does sing in the movie I Now Pronounce You Chuck And Larry!
no
Parody music
They sing like pop music, but they also sing rock with Rammestei, their current music is considered pop-electronic
cool music
they used to sing Latin Pop
Rap
Reggae.
Rock!
zac efron music
Louis Tomlinson and the rest of One Direction sing Pop music mostly.