Justin Trudeau's participation in Katy Perry's Lifetimes Tour event in Montreal on July 30 has generated questions about their friendship. The former Canadian Prime Minister's appearance at the concert comes just days after he was caught dining with the Roar singer at Montreal's Le Violon restaurant, according to TMZ.

Justin Trudeau participated in Katy Perry's Lifetimes Tour 

Justin Trudeau appears to be having a good time at the Lifetimes Tour, as evidenced by videos and photographs from the Bell Centre. The 53-year-old, clothed in a black T-shirt, was seen singing along to Perry's big songs such as Roar and Fireworks. According to Page Six, Trudeau's 16-year-old daughter, Ella-Grace, also attended the concert.

Social media users reacted quickly to the clips. "Justin Trudeau knows the lyrics to Katy Perry's songs, while Orlando Bloom wants her to retire..." "THE UPGRADE," one individual wrote. "The way Justin Trudeau looks at Katy Perry during her performance!!! Oh, he's in love!!!" another added.