Christopher Michael Oliva was an American musician who was the lead guitarist and co-founder of the heavy metal band Savatage. During his lifetime, he released seven studio albums and one EP with the band.

Sirens is the debut studio album by American heavy metal band Savatage, released in July 1983. The music on this album is heavier than in later Savatage albums, where the band developed their own style of progressive metal. It has also been cited as a key inspiration for the then-burgeoning thrash metal scene.