I agree with FanSince04, the clubland scene is definitely a nod to Before He Cheats (I don't know Nashville, so I can't say if it's filmed in Printers Alley, where the first one was - but it must have been intended to give a similar retrospective vibe)
The pink sunglasses may be a nod to Miranda Lambert's song (they have seemed to make visual references to each other's work in three or four of their recent videos). The point about those glasses in the song was that they're not only a device to protect your emotions - they're also mythical, in the sense that even if you lose them, it's still possible to conjure up a metaphorical pair to hide behind.
I really like the contrast between the glitz and glamour that's required on stage, no matter how it really feels - and the letting go at home. That is something that I expect many in the genre - especially women - feel. And it brings out the pressure of sustaining a "personality image" on tour and in showcases. I think the Mainstream, in particular, needs this portrayal, as it thrives on artificiality. Carrie's private persona shots focus on aspects of the reality behind the glitz.
I like the emphasis on the band in some shots - again, that isn't always the case in Mainstream videos. And I applaud her for not going for elaborate extra story line elements - something that I think would have distracted from the emphasis on emotion.
I'd rate this one of her best
