Backstreet Boys
N'Sync
Five

Britney Spears
Christina Aguilera
Billie Piper
Jessica Simpson
Mandy Moore

Backstreet Boys are still alive.

N'sync and Five are both officially disbanded after their compilation albums.

Britney and Christina both are having strong problems right now.

Billie and Jessica both switched from being singers to actresses after their complilation albums.

Mandy is no longer in public, but she is doing better as both a singer and actress.