7. Katharine McPhee from Scorpion
Not only does Scorpion actress Katharine McPhee have some pretty awesome acting chops, but she's also got a killer set of pipes. (Remember, this lady did get her start on a singing competition TV show.) We love all her tunes, but we're especially partial to her rendition of Gretchen Wilson's "Redneck Woman" because it's guaranteed to get you two-stepping.
Watch Scorpion on CBS and CBS All Access.