Did Britney Sing Sia's "Perfume" At #PieceOfMe?

Britney sang a surprise duet of “Perfume” with Sia during Piece of Me on Saturday, only Sia wasn’t there and this probably wasn’t meant to happen.

Sia’s rendition of “Perfume” was heard pretty clearly at the show two nights ago, and pretty obvious in the plethora of Instagram videos posted from the show (you CAN hear Brit’s vocals, too).

And while I do spot Sia, Brit’s reps shot down the claim, telling the Daily Mail it’s “not true.”

What do YOU think? Take a listen and leave a comment in Exhale: