It's not a foolproof system, since a select few are publicity whores no matter their level of talent, success of fame, but one can usually tell a D-List celebrity by the relative enthusiasm with which they greet attention from the paparazzi.

Check out Shar Jackson's bright, beaming smile as she answers questions about her more famous baby daddy and his way more famous ex-wife. The only thing better would be if they actually asked her a question about herself.