'Saturday Night Live' Season 50: A Very Musical Premiere & Dream Performers

The season 50 premiere of "Saturday Night Live" was a very musical episode, and it's got Keith and Katie thinking about what could be in store for the rest of the historic season. Could "SNL" bring back season one performers? Maybe introduce some legendary acts to the "SNL" stage for the first time? Plus, chart news about Future, Katy Perry and Chappell Roan.

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