Surprise! Sia and her filmmaker fiance Erik Anders Lang tied the knot at her home in Palm Springs over the weekend.

The couple got engaged just two months ago, but they've known each other for several years, so don't go accusing her of pulling a Kaley Cuoco!

The notoriously private singer/songwriter, 38, even hinted at the nuptials when she tweeted, "Omg omg I'm so excited," on Saturday morning.

There were two large Classic Party Rentals trucks unloading supplies at Sia's Tahquitz River Estates neighborhood according to The Desert Sun newspaper, and Radar reports that celebrity photographer Terry Richardson shot photos at the ceremony. Hopefully he'll release one or two on his Terry's Diary site, but given how camera shy Sia is, we're not holding our breath!

Sia was previously linked to singer/DJ Jocelyn "JD" Sampson, but the ladies broke up in 2011. Congrats!