iHeartRadio Countdown: Rob Thomas Talks Christmas Music and More! iHeartRadio Countdown: Courtney Takes Over as Host, Adele Reigns at #1!iHeartRadio Countdown: 80's Icon Rick Astley Checks in! iHeartRadio Countdown: Larry The Cable Guy Talks 'The Masked Singer' & MoreiHeartRadio Countdown: will.i.am Talks 'Alter Ego', New Music & More! iHeartRadio Countdown: Randy Jackson Talks Journey Reunion & More!iHeartRadio Countdown: Meghan Trainor Checks in to Talk New Podcast & More!iHeartRadio Countdown: Tori Spelling Stops By To Talk New MTV Show & More!iHeartRadio Countdown: 'Blackish' Star Marsai Martin Joins us!