The original sources used were:
Ke$ha – Tik Tok
Metallica – Frantic

DISCLAIMER***
This is a non-profit video/mashup. Use of copyrighted material is consistent with the “fair use” provisions contained in section 107 of the Copyright Act of 1976; the use of copyrighted material is of a nonprofit, educational nature, intended for the sole purposes of research and comment and does not significantly negatively affect “the potential market for or value of the copyrighted work(s).” No money is or has been made from the content here, and copyright remains that of the original artists. Tracks, images, and/or videos will be removed at the request of any of the artists referenced. These tracks are not existing in any commercial forms. All of my works, the mash ups, the remixes, videos, and the compilations were created for my own entertainment, not profit. I am not the author or owner of the copyrights of the component tracks. If you like the mashup or video, go and buy the original songs. Representatives of either the artist or publishing company can contact me, and I will take these tracks offline.