You may not recognize Mark Ronson, but you'd definitely recognize at least one of the countless hits he's worked on in the past 10 years. He began as a socialite DJ back in the '90s, a New York cool kid who went from spinning at hip-hop clubs to high-fashion parties. Born in London in 1975, Ronson moved to NYC in the early '80s, and his catalog celebrates the city that was rebuilding itself from ruins, inspired by disco and hip-hop.