Another singer, Nico (of the Velvet Underground and a solo career) (real name Christa Päffgen) was riding a bicycle on July 18, 1988, during a vacation with her young son Ari on the Spanish island of Ibiza. Nico fell off the bicycle in an accident and hit her head.
A passing taxi driver found her unconscious, but had difficulty getting her admitted to local hospitals. She was misdiagnosed as suffering from heat exposure. But she was later and X-rays later revealed a severe cerebral hemorrhage as the cause of death.
Wow, it happened to Nico too! I hot married that very next month. Missed that story...was, um, peoccupied with other things.