After months of promises, American Idol judge Steven Tyler finally performed on the show's season finale. Backed up by members of Stone Temple Pilots and a string section, Tyler delivered a powerful rendition of the Aerosmith classic "Dream On" that came out sounding like a message to all the show's contestants – past, present and future. The most amazing thing about this performance is that even when cut down to just two minutes, the song still comes across as a massive rock epic.
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