I do have many many favorite songs that are in my "go to" file.  Megadeth's 2007 album "United Abominations" featured a remake of a Megadeth song called "A Tout Le Monde" that was so titled Set Me Free and Featured Lacuna Coil singer Cristina Scabbia.

The very first time I heard this song I was immediately hooked by the power of Megadeth and Cristina's vocals. This song just makes me blow out my speakers.

I would love to see this song performed live with 2 very talented lead vocalists, but I will settle for a killer video.

Lacuna Coil is on tour with Megadeth, Motorhead and Volbeat.