21 Under 21's Next Class: Vote For 2016's Best Bet

Adam Bettcher/ Getty Images for Nickelodeon
Daya records TeenNick Top 10  at Mall of America on Oct. 11, 2015 in Bloomington, Minnesota. 

On Billboard's just-released 21 Under 21 countdown, Australian favorites 5 Seconds of Summer top the 2015 list, followed by pop stars, country darlings and Vine breakthroughs. (See the full 21 Under 21 list here.) But every year, we dig deeper to find the best artists who are still bubbling under the main list but worth your attention with our Next Class poll.

Billboard's 21 Under 21 2015: Music's Hottest Young Stars

Who do you think is the next 5SOS? Which under-21 artist has the chops to soar to the top and be on next year's 21 Under 21 list? Is it someone we've found or do you know someone even better? Vote now!

Daya is not only an accomplished singer/songwriter and talented multi-instrumentalist, but at 16, she’s achieved what many musicians twice her age never do: a hit song with "Hide Away" (below), which is scaling the Billboard Hot 100 now.

Jasmine Thompson
The 14-year-old singer/songwriter rose to fame with her vocals on Felix Jaehn's "Ain't Nobody," a cover of the 1983 Rufus & Chaka Khan song. Thompson has 1.8 million subscribers on YouTube and released her EP, Adore, in September of this year. The teen pop artist will be supporting Ella Eyre on several U.K. dates. 

Bea Miller
The former X Factor contestant is not apologizing for her success. The 16-year-old earned a Hot 100 hit with "Fire N Gold," opened for Fifth Harmony and Demi Lovato, and got signed to Hollywood Records all before she got a license.

Kodak Black
The 18-year-old rapper was only recently able to buy a lottery ticket, but he probably won't need to now. Drake has given some early shine to the MC by playing his song “SKRT” on Beats 1's OVO Sound Radio.

Not to mention, without Kodak Black, we wouldn't have this gem of a Drake dance-party video.

Six is better than one -- or at least it is in the case of K-pop girl group GFriend. The sextet released its EP Flower Bud in July and was nominated for Best Korean Act at this years MTV EMA.

Sawyer Fredericks
The sweet-faced 16-year-old melted the nation’s hearts as the most recent (and youngest-ever) winner of The Voice. The Team Pharrell contestant had seven Hot 100 hits during his time on the show and has since signed with Republic and headlined a festival. Fredericks released “Forever Wrong” this October for The Magic Strings of Frankie Presto soundtrack. 

Abraham Mateo
The ladies go crazy for this Spanish pop singer/songwriter and his Michael Jackson moves. The 17-year-old has opened for One Direction, has more than 3.7 million likes on Facebook and has an upcoming album Are You Ready? set to be released by Sony in November.

Tkay Maidza
The 19-year-old, Zimbabwe-born Australian may not be immediately recognizable to most, but she’s your favorite artist's favorite artist. She’s opened for Years & Years and Charli XCX and collaborated with Troye Sivan on his latest EP. Her Twitter followers include Rita Ora and Yoko Ono (!).