With an awful pun worthy of this blog, UMG are releasing an iPhone app, Mariah Carey-Oke.

Fans get to sing along to four of the her songs and are awarded points if they match her vocals – Singstar in an app, an interesting way to tie in the iPhone’s microphone functionality.

In addition, the app includes news and tour information, as well as integration with Twitter and Facebook, and links to buy songs from iTunes. It costs $3.99 in the US a premium on the cost of purchasing the songs through iTunes, but is as yet unavailable in the UK.