Australian singer Sia Furler got her start singing with the likes of Jamiroquai, Massive Attack and Zero 7, so the fact that her third and latest solo disc, "Some People Have Real Problems," has a mysterious undercurrent should come as no surprise.

But Sia's not working strictly in R&B, trip hop or electronica. Her music is rockier, folkier than the outfits she's previously worked with. But a track like the record's opener, "Little Black Sandals," draws enough on her past alliances and influences to basically avoid easy categorization.

That should help her popularity and indeed, with her disc for sale in Starbucks and radio play coming from a variety of formats, Sia can draw as much from the World Café crowd as from fans of Nelly Furtado.

If you wanna see what the fuss is all about before picking up the record, check out Sia when she plays at Turner Hall Ballroom Wednesday night at 8. Tickets are $20. Also on the bill is the considerably harder to define Har Mar Superstar.