This weekend on The iHeartRadio Countdown with Mario Lopez Matchbox 20 front man Rob Thomas checks in! He's dropping a new solo album called 'Chipped Tooth Smile' in April and he's getting ready to hit the road on a tour as well! Plus he's talking about the big plans he and his band Matchbox 20 have for the year 2020. So we'll catch up with him, countdown the top 20 and more! Tune in!