Some people take karaoke very seriously. In sweaty venues across the country, singers are racking up points in team karaoke leagues, renting live backup bands, or hoping passerby producers sign them ...

Probing the bizarre subculture of cutthroat Karaoke competitions, "Karaoke Fever" is a world away from the glossy "Duets." Filmmakers track various contestants as they vie for $15,000 and a recording ...