Chart Wars

Who determines a hit? Last week, the Billboard charts met a new challenger. The Ultimate Chart ranks artists and singles not just by sales and airplay, but also by their status on streaming services and social networks. In a Soundcheck Smackdown, critics debate whether any pop chart can quantify success in the digital age. Later, Norwegian singer songwriter Sondre Lerche plays songs from his latest album, "Heartbeat Radio," live in our studio.