12. Sunny Sweeney, "Bad Girl Phase"
No one extolls the virtues of mischief quite like the lovably sassy Sweeney. Her twangy, unapologetic "Bad Girl Phase" sets the agenda for an ethics-free night of smoking, drinking and two-timing. The devil whispering in her ear is, especially in country music, more often perched atop broader shoulders, but this song's lyrics never venture into feminist territory. They don't have to, because even though it's about a wanton woman, guys can certainly relate. "I'm just doing in the light what you want to do in the dark," Sweeney sings, trading her moral compass for a daring direction.