Not a professional recording, but still worth checking out.
Youtube info:
Published on Oct 24, 2013
Katy Perry Sings “Roar” With Tegan and Sara & Special Guests At The #WeCanSurvive Benefit Concert – Hollywood Bowl 10/24/13
Get Tegan and Sara’s New Single “Closer” here: http://bit.ly/17Li9CZ
Performers Include:
Katy Perry
Tegan and Sara
Sara Bareilles
Kacey Musgraves
Ellie Goulding
Bonnie Mckee
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