Ariana Grande knows how to best an ex! Not only does she have one less problem without him -- she looked amazing as she belted about it at the 2014 Billboard Music Awards.

The pint-sized singer has been channeling a mod, 1960s look as of late. It's a style the compliments her signature ponytails and bouffant hairstyles.

During the 2014 Billboard Music Awards, Ariana performed her latest hit, 'Problem,' while showing off her legs in a black-and-white checkered miniskirt. She added matching knee-high boots for a graphic, sexy look that fits the sassy nature of the song. Ariana seemed completely at ease as she commanded the attention of everyone watching.

The look definitely gives off some retro vibes, but we like that it's a unique style. Like Ariana's voice, it's completely different from anything else in pop music! It's the perfect look for a powerhouse performance during a major awards show.

Check out Ariana's mature, black-and-white ensemble in the photos below.

Ethan Miller, Getty Images
Ethan Miller, Getty Images
Ethan Miller, Getty Images