The 30-year-old “Dark Horse” singer and John, 37, were spotted in Beverly Hills together, though it’s not clear if their romance has been rekindled.
“They actually buried the hatchet a while back, and they are friends,” a source said. “It’s not a surprise they would see each other socially. She’s focused on her career and making herself happy.”
Katy was most recently linked to DJ and music producer Diplo.