You can download the project used in this tutorial here - www.image-line.com/documents/n...
You can then drop your own music track on the existing Audio Clip, rather than re-create the project from scratch.
NOTE: We say 'vocal remove 'if you are lucky' for a good reason. This technique relies on several assumptions in the original (as explained in the video).
Enjoy!
Disclaimer: Starstruck from The Fame album, by Lady GaGa, has been used for educational purposes in accordance with section 107 of US Copyright Law.
You can buy Lady GaGa's music here - itunes.apple.com/us/artist/lad...