WATCH: Why a great song gets stuck in your head On Demand Video Author CNN , Publish Date Tue, 2 Feb 2016, 9:33AM WATCH: Why a great song gets stuck in your head On Demand Video Author CNN , Publish Date Tue, 2 Feb 2016, 9:33AM You hear a song, then you can't get it out of your head for days. It happens to all of us, but why? CNN's Dr. Sanjay Gupta explores the impact music has on the brain. Get the App Take your Radio, Podcasts and Music with you Get the iHeart App Close Get more of the radio, music and podcasts you love with the FREE iHeartRadio app. Scan the QR code to download now. Download from the app stores Stream unlimited music, thousands of radio stations and podcasts all in one app. iHeartRadio is easy to use and all FREE
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