Check out this new song we've just discovered...

...by Canadian electro duo MSTRKRAFT (pronounced master-craft). Jesse F. Keeler and Al-P (Alex Puodziukas), who make up MSTRKRFT, have used the vocals of Grammy Award winner John Legend on their new song Heartbreaker:

John Legend joined MSTRKRFT to perform the song live on the Late Show with David Letterman - check them out here:

Click here to go to MSTRKRFT's MySpace page.

What do you think - do you MSTRKRFT as much as we do?! Let us know below!