The tune, unveiled at midnight on Thursday, has Perry taking a more emotional tone than her recent singles, musing over a piano melody. The video is equally ethereal, with Perry looking like a queen in white. And very much like a mom in waiting.
"I've never worn white, but I want to get it right, yeah I really want to try with you," she sings.
READ MOREKaty Perry Sets Australian Bushfire Relief Concert"Never Worn White" follows previously-released songs "Small Talk" and "Harleys in Hawaii."
Katy's still not talking about the bump, which we see in the music video. Though she did drop another hint: "Let’s just say it’s gonna be a jam packed summer..."