Shania Twain ruled the charts in the ’90s, with hits like “Don’t Be Stupid (You Know I Love You)” and “Man! I Feel Like a Woman.” Since she stepped away from the spotlight, a new breed of country music, dubbed “bro-country,” has emerged, and even though it can be frustrating for female country acts to watch their male counterparts dominate the airwaves, Twain isn’t deterred.