Justin Trudeau 's Halloween outfit had fans speculating whether he was giving a cheeky nod to new girlfriend Katy Perry . The former Canadian Prime Minister took to Instagram on Friday October 31 to share photos of his costume, posing in a blue shark outfit alongside his youngest son, Hadrien, 11, who was dressed as a wounded surfer. "Ready for Halloween with Hadrien: he's the surfer, I'm the shark (to his left)," Justin, 53, captioned the post. "We built the costume together – a little father-son Halloween teamwork." But fans quickly picked up on a familiar detail – the resemblance to "Left Shark," Katy ’s now-iconic backup dancer who went viral during her 2015 Super Bowl halftime show after freestyling through "Teenage Dream."

"Cause you are the left shark now," one follower quippe

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