Supernatural Soundtrack

Chaos

Lazy Stars

According to http://www.supernaturalwiki.com/ this is the song that Meg is listening to when Cas wakes up

Amazon

Disparate Youth

Santigold - Master of My Make-Believe

I believe it's music Meg is listening to on headphones when Castiel wakes up, hard to tell

Amazon

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Song previews provided courtesy of Apple Music and Spotify.