Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts.

On the new Billboard Pop Shop Podcast, we're also chatting about jingly jams from Gwen Stefani, Jonas Brothers & Pentatonix.

Yes, we have started singing a song to ourselves in public without realizing it. And yes, we’ve gotten some crazy looks from people. Not because our singing is great, but because they’d like us to ...