The two entertainers were spotted at the award ceremony on Thursday evening (March 14) at the Microsoft Theater in Los Angeles.
Jamie was also accompanied by his 25-year-old daughter Corrine, who joined him on stage to present an award.
Other award show atendees included DJ Mustard.
The iHeartRadio Music Awards airs tonight at 8pm ET on Fox.
FYI: Corrine is wearing a Pamella Roland gown.