9. Ashley Simpson
In 2004, Jessica’s little sister, then 20, appeared on “Saturday Night Live” and had a lip-synching disaster of epic proportions. A prerecorded vocal track began playing during what was supposed to be a live performance. At first Simpson blamed her band for cuing the wrong song. But two days later on Ryan Seacrest’s radio show, her father and manager, Joe Simpson, explained that she had a sore throat from acid reflux and couldn’t sing. That’s why she had arranged to lip-synch. To avoid further embarrassing episodes, Ashlee herself changed her diet to avoid dairy and eats nothing after 9 p.m. She keeps silent for an hour before going on stage. It also helps her indigestion to keep her head propped up when she sleeps.