The legendary female singer of a rock band famous in the 1950s and 60s has been missing for four days after she vanished on the New York City subway. Sandra Hall, 80, is a former member of the Los ...

Girl groups have been a vital part of popmusic for nearly 100 years. The category hit a peak in the late '50s through the '60s, particularly after early rock and roll and the revival of guitar rock.