The 27-year-old musician hit the red carpet at the award ceremony on Thursday evening (March 14) at the Microsoft Theater in Los Angeles.
During the show, Betty had freaked out when the Backstreet Boys took the stage.
“Guys I am DYING! I wanna learn all these moves right fkn now,” Betty wrote on her Instagram story.
The iHeartRadio Music Awards airs tonight at 8pm ET on Fox.
FYI: Betty is wearing a Zigman bodysuit, Jimmy Choo heels, House of Emmanuele earrings, H Crown rings and more jewelry from The Residency.