-30. Adam Lambert
Net worth: $16 million
Adam Lambert's glam-rock style made him stand out on Season 8 of "American Idol," despite his runner-up finish. After the show, Lambert released his first album, "For Your Entertainment," which is certified gold and featured the single "Whataya Want From Me," which earned him a Grammy nomination. His sophomore album, "Trespassing," went straight to No. 1 on the charts and sold 77,000 copies in its first week, Entertainment Weekly reported. And he hasn't slowed down since. Lambert released his latest single, "Two Fux," in June 2017 and currently is on an international tour with legendary rock band Queen.