Imagine this nightmare scenario: You are at the gym crushing your New Year's resolution when your headphones die right as your music kicks into high gear. Instead of fist-pumping your way through 30 minutes of cardio, you now have to endure a deafening silence. Avoid that debacle by snagging a pair of Beats Powerbeats3 wireless earphones, which are on sale for an incredible 60 percent off at Amazon right now. Normally $199.95, they can now be yours for just $79.99. That's the lowest they've ever been on Amazon, according to price tracker CamelCamelCamel. With awesome sound, they offer 12 hours of battery life and an ergonomic design for comfort and performance. The Powerbeats3 are also sweat and water resistant, which means they are durable no matter the weather. If your battery is low, you can get a full hour of listening time on a five-minute charge. The built-in mic even lets you talk hands free while your arms are busy getting ripped. These wireless earphones earned "g...