The SingStar servers were recently brought down to allow a smooth transition for the game's next big update. Try not to get to frazzled by the downtime -- according to a recent post on Playstation.Blog, this update includes the long-awaited fix for the rhythm title's unfortunate knack for erasing the user's purchased tracks. A handful of other changes to the SingStore and the game's online community will also be introduced in the patch. The full list of these additions can be found after the jump. The blog post also announced that the franchise recently hit a fairly brag-worthy milestone: SingStar games have sold over 20 million units worldwide. That's right -- at least 20 million shrill karaoke covers of "Careless Whisper" have pierced the night around the globe. That kind of noise pollution is just unthinkable.