"Weightless" is apparently the most relaxing music ever recorded. In a study paid for by Radox Spa, stress specialists found that "Weightless" by Manchester band Marconi Union helped women relax more than songs by Enya, Mozart, and Coldplay. "A continuous rhythm of 60 BPM causes the brainwaves and heart rate to synchronize with the rhythm: a process known as 'entrainment,'" according to ShortList.com.