Geri Halliwell is an ex-spice girl, singer, writer and the spouse of Red Bull team principal Christian Horner. The Red Bull boss has been under fire recently, as he is accused of an incident of inappropriate behaviour with another Red Bull employee.
No matter the reason, here is our list of shocking departures that changed the course of pop music itself. (Note: We did our best to distinguish quitting from being fired from a band, as that's a list for another day.)