To preview their North American summer tour, which begins on Thursday( June 19) in Chicago, Queen and Lambert performed a 40-minute set for about 650 lucky fans. The event was video streamed on Yahoo Screen, with a live audio stream on Clear Channel stations around the country and iHeartRadio.com.

'I’m a huge Queen fan,” Adam Lambert said shortly after he completed his run on season eight of American Idol. 'Freddie’s the man. He's the voice. Just the musicianship required to sing that kind of music is really high. It's very melodic and rangy and dramatic and I appreciate all that.'

Five years later, standing front and center at the iHeartRadio Theatre in Burbank, Lambert said that if you had told him back then that he would be touring as the lead vocalist of Queen, he wouldn't have believed you for anything -- and who would have argued with that?