This weekend on the iHeartRadio Countdown with Mario Lopez the very talented Laura Marano is stopping by to help us Count down the top 10! She's working on a new movie with Robert De Niro, just signed a new record deal and just hosted the red carpet at The Billboard Music Awards! We'll catch up with her and find out if The Chainsmokers can hang onto the #1 spots for another week! Tune in!
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