No, no, you misunderstood me...
Personally, I don't think there's a song of hers that can be called commercial fluff. Of course, there are deeper songs than others (especially in Up!) but all of them have a message.
But I know there are people here who think she wrote commercial fluff.

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Today is your day
And nothing can stand in your way
Today is your day
Everything's goin' your way