Justin Trudeau is picking a side in Barbenheimer. The Canadian prime minister shared a photo on Instagram of himself and his oldest son, Xavier, 15, posing in front of a Barbie poster at a movie theater, which he captioned, “We’re team Barbie.«The father-and-son duo twinned in pink to honor Greta Gerwig’s history-making $1 billion film, which is being widely hailed as a feminist masterpiece and a celebration of women.Trudeau shared the photo days after announcing on social media that he and his wife, Sophie Grégoire Trudeau, are separating after 18 years of marriage.