One in each of these couples is an overachiever

1. Antonio Bandaras and Melanie Griffith

2. Demi Moore and Ashton Kutcher

3. Tom Cruise and Katie Holmes

4. Hugh Heffner and any/all of his girlfriends

5. Courtney Cox and David Arquette

6. Sean Penn and Robin Wright Penn

7. Shania Twain and Mutt