The rumored new couple stepped out together in Montréal recently, and a source tells PEOPLE they're "interested in each other"

Pop star Katy Perry and former Canadian Prime Minister Justin Trudeau sparked dating rumors after being spotted together at a Montreal hotel and then again later at Perry’s Lifetimes Tour. Following Perry’s recent split from Orlando Bloom,

The chef who served Katy Perry and Justin Trudeau detailed how they were as guests—and whether they showed any PDA amid dating rumors.