(Looking ahead, should Perry post a third No. 1 from "PRISM" [perhaps potential single candidates like "Birthday," "Walking on Air" or "International Smile"?], she'd join Houston as the only women with at least three leaders from consecutive studio albums.)
I see Billboard paying Legendary Lovers and This Is How We Get Our 10th #1 dust.
That's what people said after Firework and Roar 
