Ariana Grande & Hailee Steinfeld Perform at iHeartRadio Music Festival with Zedd

Ariana Grande and Hailee Steinfeld set the stage on fire during the iHeartRadio Music Festival on Saturday (September 24) in Las Vegas.

The two singers performed just ahead of Zedd, who truly set off fireworks during his performance at the annual festival.

Earlier in the day, Hailee performed during the Daytime Village.

PHOTOS: Check out the latest pics of Ariana Grande

The CW stars Mekhi Phifer, Riley Smith, Justin Baldoni, and Tori Anderson were also seen at the event.

FYI: Ariana is wearing a Versus Versace coat. Hailee is wearing a Bryan Hearns top.

40+ pictures inside of Ariana Grande, Hailee Steinfeld and Zedd…