VIDEO: Ariana Grande Stuns at AMA's with Acoustical Jazz Medley of Latest Hits

At last night's AMERICAN MUSIC AWARDS, Broadway baby Ariana Grande showed off her stunning vocal chops with a stripped-down, acoustical jazz medley of her latest hits, including "Problems" and "Break Free." The medley transitioned into "Love Me Harder" followed by a more modern duet featuring The Weeknd. Get a blown away below and click here for a full list of the night's winners!

ARIANA GRANDE first landed at the top with her first full-length album for Republic Records, Yours Truly. It debuted at #1 on the Billboard Top 200, Billboard Digital Albums Chart, and iTunes Overall Albums Chart. Moreover, it yielded the game-changing pop smash "The Way" featuring Mac Miller. One of 2013's defining songs, the single went double-platinum, hit the Top 10 of the Billboard Hot 100 and reached #1 on the iTunes Overall Top Songs Chart. In the aftermath, she was named "Best New Artist" at THE AMERICAN MUSIC AWARDS in 2013.GRANDE's magnetic charm, impressive voice, and astounding presence have enchanted millions of fans worldwide. 2014 saw her reach incredible heights right out of the gate. The first single from her sophomore album, "Problem" featuring Iggy Azalea, saw her become the "youngest woman to debut with over 400K sold first-week".

In addition to ranking as the 4th "highest digital song debut for a female artist" and 8th highest ever, the platinum smash debuted at #1 on 50 countries, topping the iTunes overall Top Songs and Pop Songs charts for four weeks. At radio, it went Top 10 at Top 40 and Top 5 at Rhythm. Other accolades followed throughout the year with GRANDE winning "Favorite Breakout Artist" at the People's Choice Awards 2014, the "Young Influencer Award" at the iHeartRadio Music Awards, the "Radio Disney Chart Topper Award", and more.

Grande made her Broadway debut in the musical '13.'