We're about half way through 2020 believe it or not so we're doing something a little different this weekend on The iHeartRadio Countdown with Mario Lopez! We'll be counting down the top 20 biggest songs of the year so far! Expect to see appearances by Maroon 5, The Jonas Brothers, Dua Lipa, Camila Cabello and more! Plus Mario will play a few new songs that may dominate the rest of 2020 and much more! Tune in!