Lady Gaga shocked the audience at Queen's Aug. 27 show in Sydney, Australia, taking the stage for a surprise performance of 'Another One Bites the Dust' with Adam Lambert.

As fate would have it, Gaga just so happened to be touring the Land Down Under at the same time as Queen and Lambert -- so why not perform a totally kickass cover of the band's most iconic songs? Seriously, Mother Monster and Adam Lambert totally nailed the number, punching it up with their powerhouse vocals, super passionate and intense stage presence and badass leather ensembles.

And as die-hard fans know, Lady Gaga isn't just a casual supporter of Queen -- she's such a huge fan that she even took her name from their song 'Radio Ga Ga.' So of course, it was only fitting that she performed with the hit with Lambert.

Check out their unbelievable performance of 'Another One Bites the Dust' above, and see the sweet pic of the duo in Lambert's Instagram shot below.

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