Possible Clues:

• One-named Vegas headliner
• What's expensive in Paris?
• Bono's first bride
• Early adopter of Auto-Tune
• One-named gay icon
• Chastity's mother
• 'Believe' singer, 1999
• Gregg Allman's wife who filed for divorce after nine days
• Mother of Chaz
• Sonny Bono's partner