I decided to mash up
Good Time by Owl City & Carly Rae Jepsen and
Momma Look At Me Now by Galantis. These were the results!
In this first edit, I have the Galantis song as the backtrack, with Carly and Adam's vocals inserted and pitched down to match.
In this second edit I flipped it, Good Time backtrack with Galantis vocals pitched up. As a bonus, I added the Good Time drums in for an added beat/kick, and the Good Time background vocals track.
And, the finished product, based on the second edit. I cleaned up the messy pitch shifting and dropped in some vocal slices from Good Time. Enjoy!
Hope you like :D