The 34-year-old wowed in a floor-length pink gown, and a strategically placed blue bow.
"Calling it - Katy Perry is pregnant!" one person tweeted after watching the video.
On May 29, Katy Perry attended the YouTube Music & Katy Perry Fan Experience.
She wowed in a beaded shift dress with matching pants.
The stunning look was a far cry from her usual outfit choices, which a seemingly fitted.
Katy Perry is currently engaged to Orlando Bloom - who popped the big question on Valentine’s Day 2019.
According to Life & Style magazine, a source said: “Katy had wanted to wait until after they were married to have kids, but that’s not written in stone.”
Adding, “If she were to get pregnant today, she’d probably just postpone the wedding until after the baby’s born.”
Meanwhile, kids are a big part of the couple's future.
“Katy is slowing down her career this year,” a source told People.
“[They] want to get married and start a family sooner rather than later.”
Even Orlando has confessed he wants to give his son Flynn, who he shares with ex-Miranda Kerr, more siblings.
The dad-of-one dished to fans on Instagram: "Yes, I love being a dad," when asked if he'd like more kids.