Official Website- www.siamusic.net Facebook- Sia Furler Twitter- twitter.com/siamusic Myspace- www.myspace.com/siamusic Be sure to tune into "The Voice" on NBC at 10:00 PM ET tonight (May 10, 2011) to catch an appearance by Australian born singer Sia who will be a guest mentor on Christina Aguilera's team. I've posted about her before, but in case you haven't … [Read more...] about Aussie singer Sia to guest mentor on NBC’s “The Voice”