1. Jessica’s parents have always made excuses for her bad behavior, but this time they told her they were not going to protect her, and that it was time she faced the music
2. Paul took his parents’ car without permission and put a big dent in it. He knew they would find out, so he decided he’d better face the music and tell the truth right away.

Compare to: bite the bullet; take the bull by the horns. Whereas bite the bullet focuses on preparing oneself to accept physical pain or punishment, face the music focuses more on accepting responsibility for some misdeed.