SAN FRANCISCO--(BUSINESS WIRE)--Rdio, a leading global music streaming service available in 85 countries, today introduces Rdio Select – a first-of-its-kind $3.99 subscription tier for mobile users that features a unique combination of ad-free streaming radio and the ability to select up to 25 new songs a day on demand. Subscribers can keep 25 songs at a time for as long as they want, and replace them with up to 25 new songs every day. Rdio Select also includes unlimited access to ad-free strea