You Don't Know What Bad Is Until You Listen To The Shaggs

• When Dorothy, Betty and Helen Wiggin, three teenage sisters from Fremont, N.H., went into a recording studio on March 9, 1969, they had no idea that they would be writing a small chapter in rock history, or inspiring a stage musical. To be fair, even the biggest fans of the sisters -- who are better known as The Shaggs -- would probably admit the album recorded that day, Philosophy Of The World, belongs on a short list for the worst music ever committed to vinyl. Despite that (or maybe because of it) the group's fan base has included luminaries like Frank Zappa, Kurt Cobain, Bonnie Raitt and Joy Gregory, the playwright for "The Shaggs: Philosophy Of The World," a stage musical based on the life of the Wiggins sisters that premieres June 7 at Playwrights Horizons Mainstage Theater in New York City.