Did you know that some of America's biggest singing sensations started with karaoke? Taylor Swift, Carrie Underwood and others began that way. Who will be the next singer to leap from the karaoke circuit to superstardom? "Karaoke Battle USA" shines the spotlight on the best karaoke singers across the country in six one-hour episodes, hosted by Joey Fatone (*NSYNC, "Dancing w/the Stars") and premiering with a two-hour episode, FRIDAY, AUGUST 12 (9:00-11:00 p.m., ET) on the ABC Television Network.