This weekend on The iHeartRadio Countdown with Mario Lopez incredibly talented Luis Fonsi stops by the studio today to help us Countdown the top 20 songs! He's about to kick off Season 2 of 'La Voz US' over on Telemundo, he's working on new music and of course preparing for the holidays. So we'll catch up with him, play some throwback classics and more! Tune in!
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