Blake Shelton Stuns Concert-Goers When He Calls Adam Levine A DOUCHEBAG! What Brought This Shade On?

Blake Shelton and Adam Levine's 'feud' is so NOT over!<br/><br/>At Madison Square Garden on Friday, the country star singer and veteran Voice coach took an opportunity to insult his faux rival, Adam.<br/><br/>The coaches have a long history of trading insults and playing practical jokes on one another (remember the time Adam dumped manure [...]