Taylor Swift and Hayley Williams have collaborated on the song "Castles Crumbling."
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The collaboration has been highly anticipated by fans who have been friends since their teens.
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"Castles Crumbling" is a vault track on Taylor's Speak Now (Taylor's Version) album
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The song's lyrics revolve around the theme of a changing reputation and people turning against you.
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It echoes sentiments from other Taylor songs related to her experiences and emotions
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Fans speculate that the song may be inspired by the moment Kanye West interrupted Taylor's speech at the MTV VMAs in 2009.
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Taylor's vulnerability and emotions are reflected in the heartfelt lyrics of "Castles Crumbling."
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