The "Since U Been Gone" hitmaker spoke to Attitude magazine for their latest issue and revealed that she was in a dark place earlier in her career because of her weight. "I was miserable, like inside and out, for four years of my life. I like wrecked my knees and my feet because all I would do is put in headphones and run.But no one cared, because aesthetically you make sense. I was at the gym all the time."See photos of Kelly Clarkson through the years: NEW YORK, NY - NOVEMBER 03: Kelly Clarkson attends Citizen Watch Company's New York Corporate Offices Grand Opening at Citizen Watch Company Corporate Offices on November 3, 2015 in New York City.
(Photo by Robert Bertoia/Getty Images) "I was around some really negative people, and I got out of it because I had a lot of great people there, too," she continued.
(Photo by Kevin Winter/ACMA2013/Getty Images for ACM)LAS VEGAS, NV - APRIL 07: Singer Kelly Clarkson attends the 48th Annual Academy of Country Music Awards at the MGM Grand Garden Arena on April 7, 2013 in Las Vegas, Nevada.
(Photo by Frazer Harrison/ACMA2013/Getty Images for ACM)LOS ANGELES, CA - FEBRUARY 10: Singer Kelly Clarkson accepts Best Pop Vocal Album award for 'Stronger' onstage at the 55th Annual GRAMMY Awards at Staples Center on February 10, 2013 in Los Angeles, California.
(Photo by Justin Mc Intosh/Getty Images for Starstruck Entertainment)NASHVILLE, TN - DECEMBER 20: (EXCLUSIVE COVERAGE) Kelly Clarkson performs during Kelly Clarkson Miracle On Broadway - A Benefit Concert at Bridgestone Arena on December 20, 2014 in Nashville, Tennessee.
(Photo by Justin Mc Intosh/Getty Images for Starstruck Entertainment)NASHVILLE, TN - DECEMBER 15: Miranda Lambert, Reba Mc Entire, and Kelly Clarkson perform at the 2014 American Country Countdown Awards at Music City Center on December 15, 2014 in Nashville, Tennessee.
Fans could go to ABC.com/Duets immediately following the show to see a special live streaming 'After Party: Duets' event hosted by Quddus from a fully wired, custom built music lounge.