New Music from T.I. & Christina Aguilera, ?Castle Walls? [AUDIO]

After hearing about the song for what seems like months, we finally get our first listen to the highly-anticipated track from embattled rap star T.I. and singer turned actor Christina Aguilera.

Source: http://ryanseacrest.com/2010/11/29/new-music-from-t-i-christina-aguilera-castle-walls-audio/

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