Johnny Depp and Amber Heard
When we think of celebrities who aired their dirty laundry in public, this is probably the most dramatic example by a wide margin. It involved a horrific situation where Heard accused Depp of violently abusing her throughout their marriage. The culmination was a dramatic public trial that saw them reveal the worst aspects of their relationship.
Depp accused Heard of defecating on their bed before she went to Coachella. Meanwhile, Heard alleged that Depp penetrated her with a bottle and committed other heinous actions. Ultimately, a jury awarded Depp $10 million in damages and two million dollars to Heard (via Entertainment Weekly).