Who are Canada’s most famous musical twins? Before you say “Tegan and Sara,”; let’s not forget that “Property Brothers”; stars Drew and Jonathan Scott have also entered the music scene with the release of their debut single “Hold On”;.

That’s the rivalry that ensues when the Property Bros crash a Tegan and Sara autograph signing in this hilarious video in which the sibling pairs compete in a winner-takes-all “twin-off.”;

Related: Property Brothers Try To Conquer Broadway In Hilarious Star-Studded Spoof

Tegan and Sara, it turns out, have “twin telepathy, which the Scotts attempt to counter by revealing that when they were born they “were conjoined by the d…”; — at which point the crowd groans at the image that’s just been planted in their minds.

The battle escalates hilariously, but there can only be one “twinner.”; Watch: