Where have I heard it?

I opened Gun Goddess Miss Fortune like a week ago, and today I decided to try her in a custom game. When the game started up, I started hearing a familiar music. I don't know where I've heard it before, but I know for a fact that I've heard this song several times, and this was my very first time playing the skin. I also have the login music disabled for League, so I know I didn't hear it there either. I thought I heard it in the small Arcade game Riot made about Ziggs, checked it, and it wasn't the music there either. I couldn't find it anywhere, but I know for a fact I've heard it and it's driving me crazy that I can't figure it out where I heard it. You know, the kind of feeling when déjà vu hits you and you get very confused. The song: https://www.youtube.com/watch?v=O4ARTL54N2U&t=1m
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