The 31-year-old actress hit the red carpet at the award ceremony on Thursday evening (March 14) at the Microsoft Theater in Los Angeles.
The iHeartRadio Music Awards airs tonight at 8pm ET on Fox.
FYI: Shay is wearing a Nicolas Jebran dress and jacket, As29 earrings, Julien Macdonald shoes and carrying a Tyler Ellis clutch. Poppy is wearing a Viktor & Rolf dress. Larsen is wearing an August Getty top, Genny pants, Casadei shoes and State Property jewelry.