The tour includes Adam Lambert and the other runners-up of this year's "American Idol" competition, who say they don't have to worry about winning and can let it all hang out.
"To not have to worry about where the camera's going be or where you're standing is so liberating," said Anoop Desai.
Rolling Stone reported Saturday that this week's preview performance in Burbank was capped off by a group rendition of Journey's kitschy classic "Don't Stop Believing."
The stars face a rigorous schedule, performing in 50 cities in just two months.
Notable deaths of 2014 [PHOTOS]