Robert “Mutt" Lange is one of the most important figures in pop, rock, and country music, having produced massive albums for artists in every decade from the '70s onward. He seemingly coaxes hidden talents from even the biggest names in music, including Bryan Adams, Foreigner, Maroon 5, AC/DC, Shania Twain, Lady Gaga, and Muse. Here's just a tiny portion of this superproducer's incredible reach into contemporary music.