Katy Perry Reveals Her 1 Regret Over Her Cheeseburger Dress, Which Song Deserves More Love From Her Fanbase, Which 'American Idol' Winner She Wants to Collaborate With & More!

On her song that deserves more love from her fanbase…

“Probably ‘Roulette’ or ‘Legendary Lovers,’” Katy said. “Yea, they should have done more for those songs.”

Keep reading to see which American Idol winner she’d most want to collaborate with…