They have over 1.3 billion YouTube views, 4.3 million subscribers, and more than 2.4 million Facebook fans. Beyoncé, Blondie, Gwyn Stefani, and Hanson have all given thumbs-up to PMJ’s covers of their songs, while stars from Kate Winslet to Celine Dion, Jason Alexander to Adam Levine, and Lorde to Ashton Kutcher have sung their praises.