WARNING: The following Android Police story contains Carly Rae Jepsen's Call Me Maybe.
Music games are great for parties with close and consenting friends who won't judge you when you completely destroy that one riff in Down on the Corner. But they do have one failing: you can't play them without all the plastic instrument accessories, making spontaneous sessions at a friend's place something of a chore.
The creators of Sony's SingStar series have found a solution that will make you say, "why didn't I think of that?" The forthcoming PlayStation 4 edition of SingStar probably won't change the karaoke game's winning formula, but it will let you install a companion app on your Android phone and use said phone like a tiny, rectangular microphone. At this point it's pretty likely that most of the people with a PlayStation will also have a smartphone handy, so the additional functionality is downright ingenious.
The upcoming app will also be compatible with the PlayStation 3 version of the game, according to this blog post, and I assume that "[the app] is compatible with most iOS and Android smartphones and devices" means it will work just fine on non-Sony Android phones. Players will be able to select playlists directly from their phones as well.
There's no ETA for the new PS4 version of SingStar, but the blog post implies it will be several months at least until it's released.
Source: SingStar blog