Music What You Didn't Know About Adam Levine By ETonline Staff 4:09 PM PST, February 10, 2014 While there's been plenty written about People magazine's Sexiest Man Alive, Adam Levine, ET's Brooke Anderson went deeper to find out a few things you don't know about him.Related GalleryHollywood's Sexiest Shirtless Men Of course The Voice coach and Maroon 5 frontman has plenty of celebrity friends now, but there's one movie star that Levine knew well before the fame and fortune. "I've known Jake [Gyllenhaal] my whole life," said Adam. "We went to elementary school together."As one of music's biggest stars, it's hard to envision Adam in another profession, but the 34-year-old Moves Like Jagger singer filled Brooke in on his humble beginnings at a popular diner. "I worked at Johnny Rockets for exactly 2 weeks," said Adam, who was also a writers' assistant for CBS' Judging Amy.And long before finding love with fiancee Behati Prinsloo, Adam was already finding luck with the ladies.Brooke found out that his first kiss was at age 11 was with a girl named Katie at a performing arts camp."I was so scared," Adam remembered fondly.The Voice returns to NBC on February 24 and we have an exclusive photo of Adam with his guest mentor, soul singer Aloe Blacc. Check out the pic below!