iHeartRadio Countdown - Weekend of June 17th, 2017

This weekend on The iHeartRadio Countdown with Mario Lopez we have a few newcomers to the charts! Plus Summer is basically here so Mario will be playing some of his favorite Summer time throwbacks and we'll find out if The Chainsmokers and Coldplay can hang onto the #1 spot for a fourth straight week! Tune in to find out!

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