One of the most surprising moments of 2025 was when I Kissed a Girl singer Katy Perry, 41, and former Canadian Prime Minister Justin Trudeau, 54, confirmed that they were in a relationship. The pair got together following Katy’s split from Pirates of the Caribbean star Orlando Bloom, who she had been together with for nearly a decade. Katy and Justin have a 13-year age difference in their relationship, and on Friday, the pair addressed this in a playful post. Alongside a carousel of Katy’s recent days, the couple were seen together after taking a biological age test on their phones. Katy’s came out as 33, while her partner clocked in at 43. In the caption, the Dark Horse songstress teased: “How old would you be if you didn’t know how old you were?” Several of the singer’s fans started quoting the lyrics to her 2017 song, Act my Age, in response to the post, with one commenting: “ALEXA please play ACT MY AGE by queen Katy Perry,” and a second saying: “I won’t act …