iHeartRadio Countdown - Gwen Stefani Checks in! (June 30, 2018)

This weekend on The iHeartRadio Countdown with Mario Lopez the very talented Gwen Stefani will be checking in from Las Vegas! She just kicked off her brand new 'I'm Just a Girl' Las Vegas residency so we'll find out all about that, new music she's working on and more! Plus we countdown the Top 20, play some throwback classics and more!

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