Country pop singer-songwriter Taylor Swift is using mobile applications to engage her fans, as well as drive music downloads and concert ticket sales.

From ringtones, ring-backs and wallpapers to applications, games, virtual goods and video, the mobile content industry in the United States is booming like never before.

Universal Pictures is running click-to-buy mobile video ads to drive ticket sales of its “Repo Men” movie.

Rap mogul Snoop Dogg is using the mobile channel to drive sales of his CDs, DVDs and ringtones, giving away free mobile video content and wallpapers and running a sweepstakes.

Entertainment and media company PT Solegra Nusa Perdana has partnered with Alcatel-Lucent to launch a mobile gaming and music download service.

Home Box Office Inc. has launched a free application for iPhone and iPod touch to expand its mobile footprint and drive purchases of mobile content.

Photon and iAmplify have partnered to build a self-publishing platform for people and brands that want to make their premium audio and video content available on PCs and mobile devices.

Reebok issued a call-to-action via social media sites asking consumers to view a mobile video and enter a sweepstakes by opting in to the brand’s mobile database, achieving close to a 50 percent click-through rate.

Sony Music Entertainment has partnered with mobile media company SendMe Mobile to offer mobile phone users access to the music label’s roster of artists through SendMeMobile.com.