Sung in Zero G courtesy of the ISS.
http://news.cnet.com/8301-17938_105-57584107-1/chris-hadfield-sings-bowies-space-oddity-in-iss-farewell/
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Has the job. Has the vocals. Has the skills. .... and dat stache. Chris seems to be a generally awesome dude. The dude plays music with students even when in space, it's damn hard to top that.