The O-Town boys are angry at *Nsync.

The group created on ABC's "Making The Band" issued a warning to the mega-popular boyband on NME.com, saying *Nsync should be "pretty worried about shooting off their mouths".

O-Town's Jacob was referring to negative comments *Nsync's Lance made about O-Town's origin.

"I'm kinda worried that we might let out some secrets 'cos we've found out some stuff about how real or not real they are," Jacob continued.

O-Town was created by the same man behind the Backstreet Boys and *Nsync themselves.

-- AllPop