“Tonight acts one of my favorite people,” Obama said, referring to the interpreter of Firework. “I love Katy Perry. It is a fantastic person, “he added.
The Californian artist took the stage wearing an elegant blue dress singing their success Roar.
Perry, who is also a UNICEF Goodwill Ambassador and turns 30 in October, performed in 2012 during the inauguration of Obama. The singer is also a guitarist, songwriter and actress.