Katy Perry’s ‘Roar’ Is the New Champion of the Billboard Hot 100Katy Perry’s ‘Roar’ Is the New Champion of the Billboard Hot 100Katy Perry is the new champion of the singles chart this week! Her 'ROAR' knocked out Robin Thicke's 'Blurred Lines' to earn the No. 1 spot on the latest Billboard Hot 100.Karen LanzaKaren Lanza