Previous court filings saw her ex-husband allege that the singer posed a “serious and immediate danger” to their child
The singer filed for divorce earlier this year
He is seeking the monthly allowance to maintain the "luxurious and upper-class lifestyle" he had during their marriage
They had never performed the 2011 hit together due to Sia's battle with stage fright
The singer also filed for divorce from her partner Dan Bernad earlier this month
"We’ve had this special connection ever since we wrote ‘Titanium’"
Co-produced by Sia
Including covers of BTS and Billie Eilish
Sia is also the executive producer for Hilton's new album, which will be out this summer
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