It is one of the hottest music festivals in the nation, and on Friday night (September 20), Adam Lambert showed up at the iHeartRadio Festival in Las Vegas.

The "Never Close Your Eyes" crooner looked sporty in a blue and white button down as he took care of a few media obligations backstage before taking the stage with iconic band Queen for a few numbers.

The 3rd annual festival runs from September 20-21 and featured Friday headliners such as Katy Perry, Robin Thicke, Elton John and Chris Brown.

Saturday's star packed line up includes Justin Timberlake, Ke$ha and Miley Cyrus.