Aussie singer Sia to guest mentor on NBC’s “The Voice”

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 checked her music out yet, watch the video below for “I’m in Here.”