Whoa! Katy Perry's just gotten a very important stamp of approval! As the pop star's romance with Justin Trudeau heats up, his son is now opening up about their relationship and what he really thinks of his potential new stepmomma! During Wednesday's episode of the Can't Be Censored podcast, Xavier "Xav" Trudeau gushed about the Firework artist, and it sounds like they're pretty close! As a singer himself, the 18-year-old is thrilled to have a legendary performer like her join the fam: "When I'm really happy with a song, [I] send it [to her].