Adam Lambert can be seen singing harmonies with Queen icons Brian May and Roger Taylor before a concert in a clip taken from the new documentary The Show Must Go On: The Queen + Adam Lambert Story.

It airs tonight on ABC and follows Lambert’s history with the band over the 10 years since May and Taylor made what was thought to be a one-off appearance with the singer as he competed in the 2009 season of American Idol.

The clip – which you can watch below – starts with archive footage of Freddie Mercury warming up while Taylor jokingly overdoes a vocal delivery. It’s followed by a recent recording with Lambert, during which Taylor behaves in a similar fashion.

“It’s very much like in the old days,” guitarist May says. “We get together in the band room and we do harmonies – that’s what we do before a show. It oils up your vocal cords and it locks you in. You hear the other people and you rediscover how your voice fits into that structure; and I think it’s quite valuable for us to do that.”

“Our harmonies are real," drummer Taylor adds. "Some [bleeped] in The New York Times said, ‘Their harmonies were suspiciously accurate.’ … What a [bleeped] thing to say!”

Queen + Adam Lambert will tour North America from July 10 until Aug. 23; the road trip follows the success of Mercury biopic Bohemian Rhapsody. Lambert returned to American Idol last night to mentor contestants through the performance of Queen music.

Queen Albums Ranked