Which is correct: "everyone's life" or "everyone's lives"? I know that when the pronoun everyone is used as a subject, it takes singular verb agreement (as in the sentence "Everyone was there"). But this by itself doesn't seem to show that the possessive form "everyone's" always acts like a singular possessive noun. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.