“Trudeau looks VERY happy at the Katy Perry concert,” another wrote ... The exes are parents to 4-year-old daughter Daisy ...

Katy Perry and Justin Trudeau spent a day in Montreal together, going on a park walk, dinner date, and post-dinner drinks ...

Justin Trudeau attended Katy Perry’s Lifetimes Tour stop in Montreal on July 30, just two days after the pair enjoyed dinner together in the city.

Justin Trudeau turned up in the crowd at Katy Perry's July 30 Montreal show in support of her "Lifetimes" tour, two days ...