Ari-Up founder of the 70's female punk band The Slits died of a serious illness on Wednesday. Her death was reported on Johnny Lydon's website. He was her step father. Arianna Forster was 14 when she founded The Slits. According to the NY Times, she met drummer Palmolive at a Clash concert and they formed the band. The Slits wound up opening for The Clash. Whenever think of The Slits, the album cover for Cut comes to mind. The ladies are clad in mud and loin cloths. Ari-Up was 48 and had three sons.