Infidelity

Average couple: There's a possibility of spouse's infidelity with co-worker.

Celebrity couple: There's a possibility that spouse's sex scene with hot co-star was real.

Financial Problems

Average couple: Your husband loses his job. Money is tight.

Celebrity couple: Your first husband threatens to write a tell-all book about your two-week marriage; you have to pay him $20 million to keep it quiet. Money is tight.

Lack of Commitment to the Marriage

Average couple: At the first sign of marital trouble, you tell a friend you're thinking of leaving your spouse.

Celebrity couple: At the first sign of marital trouble, you tell a friend you're thinking of leaving your spouse; she, in turn, sells the story to a tabloid, and your spouse, feeling betrayed by you, has an affair—with your "friend."

Poor Communication

Average couple: You fight all the time, but nothing is ever resolved.

Celebrity couple: You text message all the time, but nothing is ever resolved.