With a couple of days off from the Australian leg of her tour, Lady Gaga did what anyone with some time to kill Down Under would do: She stuck her hand in a kangaroo's pouch to see what the hype was all about made a surprise cameo during the Queen + Adam Lambert Tour stop at Sydney's Allphones Arena.

The Sydney Morning Herald reports that although she only joined the guys onstage for one song -- Queen's "Another One Bites The Dust" -- the King of the Glamberts did serenade the "G.U.Y." singer with her namesake, "Radio Gaga," once she was back in the audience.

"So much fun tonight," Adam captioned an Instagram portrait of them taken backstage at the venue. Thanks for the invite!