It's a trend to important to ignore. Smartphones adoption is soaring. Pandora, MOG. Spotify, Rdio and almost every other music service is rushing to release and improve their mobile apps. In fact, any artist, label or music company that lacks an aggressive mobile strategy may soon be left in the dust.

According to Nielsen, smartphones were currently used by 25% of the US mobile phone audience and will overtake other cell phones by the end of 2011.  By 2013, penetration will reach 50%, and by 2014, 142.1 million users, representing 54% of the US mobile user population, will access the internet using mobile browsers or applications.