Perry’s 143 single “Lifetimes” recycles all the key elements of “Walking on Air.” It has a house beat, a theme of transcendent love, and fifth-grade vocabulary words (“infinity” and “eternity”). Sadly, the melody of “Lifetimes” doesn’t live up to “Walking on Air,” and “Lifetimes” doesn’t have the impressive diva vocals of its predecessor.

One of Katy Perry’s last Billboard Nos. 1 was “Roar,” her eye-of-the-tiger empowerment anthem from 2013. The song found new life three years later, when Perry performed it at the Democratic National Convention and lent it to Hillary Clinton for a campaign-closing ad that aligned values like respect and courage with the song’s mad-as-hell feminism: “Get ready ‘cause I’ve had enough.