Frank Sinatra
While he was still married to his first wife, Nancy, the legendary Frank Sinatra had an affair with actress Ava Gardner. Eventually, Nancy and Sinatra ended their relationship, and Sinatra married Gardner in 1951. Although he was faithful to her, he was also unfaithful to her, which led to their divorce in 1957.
Robin Thicke
Singer Thicke was married to actress Paula Patton at the time that pictures of him in a club with another woman surfaced. It was visible in the mirror that Thicke’s hand was resting on her buttocks, thanks to a reflection in it. Soon after, the couple announced their separation. Thicke had attempted to be unfaithful on Valentine’s Day in the past, according to court documents from 2013 (Patton’s words), but had been unable to complete the act due to the effects of cocaine on his performance.