Spotify

Subscription-based and free Internet radio services like Pandora and Spotify accounted for 23 percent of average weekly music listening time among U.S. consumers between the ages of 13 and 35 during the fourth quarter of 2012, up from 17 percent in the year-ago period thanks to increasing mobile engagement, according to a new NPD Group report.

In today's spotlight,  FierceOnlineVideo  takes a look at reports that popular streaming music service Spotify may add video to its product portfolio.

The streaming video business is to calling Spotify and, according to sources speaking with  Business Insider , the commercial music streaming service is listening.

Amazon's is the latest digital media giant reportedly considering a streaming music service, following speculation that both Apple and Google are both readying efforts to challenge established players like Spotify, Pandora and Rhapsody.

Spotify is pressing recording industry partners to consider offering consumers new ways to sample its streaming music service, contending that improving the mobile experience will increase interest in paid subscriptions.

If it seems like there are already too many streaming music services to count, just wait until Apple and Google enter the mix. Neither mobile giant has officially confirmed plans to launch a streaming service, but both seem like foregone conclusions to challenge established players like Spotify, Pandora and Rhapsody.