In the history of rock music, band members have come and gone, but nothing is more controversial or dangerous then installing a new lead singer in an established rock outfit. Does it help or hinder to replace your frontman or is it just plain blasphemy to even consider this practice?

This November, prog-rock band Yes will be embarking on a 40th anniversary tour without their lead singer Jon Anderson, who was forced to bow out because of illness. In Anderson’s stead on Yes’s “In the Present” tour will be Benoit David, who sings in a few Yes tribute bands out of Montreal, Canada.

Depending on fan reaction, this former tribute singer is either headed for superstardom or is very doomed.

Here’s a look at 10 rock bands that have replaced their lead singer and the subsequent outcome of their decisions.