Or any tune—studies show that not only does singing decrease cortisol levels, but belting out a ballad is a more effective stress reliever than just listening to one. Why? Debbie Mandel, author of Addicted to Stress (Jossey-Bass, 2008), theorizes that singing makes us feel better on a variety of levels. “We’re creatures of rhythm, so anything that introduces rhythm to our lives calms us down. We have comforting memories associated with songs, and singing distracts you and breaks you out of your worry loop,” she says. Do this: Turn up your favorite tunes and sing along in your car or while cleaning the house. With any luck, the traffic—and maybe even the mess—will soon feel less like a big problem and more like just another little bump in your daily road.