|1.||Janis Joplin Syndrome|
Janis Joplin Syndrome is when a music group has a female singer that becomes just as if not more famous than the band she is in. Named after Janis Joplin who was originally a member of a blues revivalist group called Big Brother and the Holding Company. If you know anything about music history, you'd know that Janis left BBATHC after a 2-3 year stint with them to start a short lived but widely successful solo career.
70% of cases of JJS often end up with either the singer going solo (see The Supremes, No Doubt and Destiny's Child) or worse, the singer being the only original member left, somewhat like Axl Rose Syndrome (see Evanescence). Most of the time, all-girl bands are immune to JJS with a few exceptions such as the Bangles.
other famous cases of Janis Joplin Syndrome include:
Diana Ross from the Supremes
Gwen Stefani from No Doubt
Beyonce Knowles from Destiny's Child
Hayley Williams from Paramore
Amy Lee from Evanescence
Susanna Hoff from The Bangles
Tarja Turunen from Nightwish