Rising star Ariana Grande took to the stage last night (April 1) at the iHeartRadio Music Awards, singing her 2013 debut hit song "The Way" and newest single "Problem."

[Listen to Ariana Grande – Problem Ft. Iggy Azalea]

Even though her respective song partners Mac Miller and Iggy Azalea were absent, Grande commanded the stage on her own (well, with a bunch of background dancers) including a quick wardrobe change from a dowdy sweater dress to a short, sparkly number, and a dance breakdown (which tickled Rihanna, who sat in the audience).

Watch Ariana's sassy performance below: