A number of stars have penned touching tributes to Michael Jackson for a special issue of Time magazine, on stands on Monday.

JC Chasez, who performed with Michael several times during his days in *NSYNC, remembered Michael as a musician who, even as a superstar, spent hours preparing for his performances.

“He was doing vocal drills for an hour before he went out,” JC wrote. “It’s not something that magically appeared on him, the guy worked hard for it. 40 years old, and the guy is warming up for an hour before every show. He wanted to give that audience the best he had.” [source]