BUENOS AIRES: Pope Leo XIV warned young people Tuesday not to be obsessed with looks or lie on social media to win popularity or approval from others.

"Idols arise and demand our worship: success at any cost, money, an obsession with appearance, popularity or the unrestrained pursuit of pleasure," he said at a youth vigil attended by 1.3 million faithful in Argentina.

He also vowed not to let illness or old age affect his zeal, urging Argentines to "go forth and be saints!".

The 71-year-old leader of the Catholic Church is on an ambitious 12-day Latin America tour less than a month after he underwent surgery for lung cancer.