You've heard this name somewhere before haven't you? This seventeen year-old pop starlet will most notably be known as the vocalist on The Chainsmokers' MEGA-hit 'Don't Let Me Down'. However, there is a LOT more to this break-out star that you need to know about.

Her latest single 'Sit Still, Look Pretty' has made an appearance in the iTunes pop chart top 10 as well as her first single 'Hide Away' notching up a massive 185 MILLION streams worldwide.

With her debut solo album due at the end of 2016 and live appearances at the White House's annual Easter Egg roll and the Radio Disney Music Awards, this lady from Pittsburgh is already on a path destined for superstardom!