A year ago today -- July 24, 2014 -- Nick Jonas released "Chains," the first taste of new music from his self-titled album and, effectively, the song that ushered in Jonas as an adult artist. In the past 12 months, he's notched two top 20 hit singles on the Billboard Hot 100 with "Jealous" and "Chains," sold over 3 million song downloads in the U.S., according to Nielsen Music, and scored a top 10 album on the Billboard 200 with Nick Jonas.