Make sure you are logged in, then visit the link below and click the delete link at the bottom of the page. Enter your password to confirm.
URLS:
http://rdio.com
http://www.rdio.com/settings/advanced/
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.