Birth Dates: Choi Seungcheol, aka S.coups: August 8, 1995 (Age: 20); Yoon Jeonghan, aka Jeonghan: October 4, 1995 (Age: 20); Hong Jisoo, aka Joshua: December 30, 1995 (Age: 19); Wen Junhui, aka Jun: June 10, 1996 (Age: 19); Kwon Soonyoung, aka Hoshi: June 15, 1996 (Age: 19); Jeon Wonwoo, aka Wonwoo: July 17, 1996 (Age: 19); Lee Jihoon, aka Woozi: November 22, 1996 (Age: 18); Lee Seokmin, aka DK: February 18, 1997 (Age: 18); Kim Mingyu, aka Mingyu: April 6, 1997 (Age: 18); Xu Minghao, aka The8: November 7, 1997 (Age: 17); Boo Seungkwan, aka Seungkwan: January 16, 1998 (Age: 17); Hansol Vernon Choi, aka Vernon: February 18, 1998 (Age: 17); Lee Chan, aka Dino: February 11, 1999 (Age: 16).
Last Year's Rank: N/A
Why They're Hot: If Seventeen doesn't become the biggest K-pop band of all time, it may go down as the largest. The group boasts 13 members (average age: 17) hailing from South Korea, China, and the United States, and it's divided into three units: one for hip-hip, one for vocals, and one for choreography. The divide-and-conquer strategy has paid off, as Seventeen's sophomore EP, Boys Be, debuted atop the World Albums chart in September. Led by the single "Mansae” -- a chipper mix of hip-hop, funk, and pop -- the five-song set followed 17 Carat, a promising debut that reached No. 8 on the World Albums chart back in May and outlasted records by better-established rivals like EXO and BTS. Although Seventeen was formed by Pledis Entertainment and launched via a reality series called Seventeen Project: Big Debut Plan, the group's members actively contribute to the writing and production of the music -- a rarity in the K-pop scene. Seventeen is a small army whose weapons include talent and creativity. If any K-pop band stands to truly conquer America, it might be this one.