On the new Billboard Pop Shop Podcast, Katie & Keith are talking all about Brenda Lee's "Rockin' Around the Christmas Tree" rocket ride to No. 1 on the Billboard Hot 100 chart, making it the third Christmas song to top the Hot 100 after Mariah Carey's "All I Want for Christmas Is You" over the last four holiday seasons and "The Chipmunk Song (Christmas Don't Be Late)" in 1958. Now that Lee has shaken up the top 10, what other Christmas song could sneak in to No. 1 next? Listen to the new Pop Shop Podcast to hear our discussion about that, plus, chart news about Taylor Swift and Michael Bublé.

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