Oh God No & I Hate You But Every Turn A Different Character Sings It. (FNF Mario's Madness) 

ooh boy, I've been waiting to do this one.
Oh God No FLP by @ivorymuse12
I Hate You FLP by @KiwisterBiwister
Timestamps
0:00 Oh God No
2:35 I Hate You
OG Mod: gamebanana.com/mods/359554
Algorithm for nerds
Friday Night Funkin': Mario's Madness is a mod directed by Marco Antonio. The mod is centered around Super Horror Mario, a demonic version of the original Mario, from the rather well-known artwork by Shadow-Shana on Deviantart. Included within the mod are many fan-created versions of official Nintendo content from the Super Mario Bros. franchise.
Friday Night Funkin' is a Newgrounds rhythm game made in HaxeFlixel originally created for Ludum Dare 47. Programmed by ninjamuffin99 with a soundtrack produced by Kawai Sprite and artwork created by PhantomArcade and evilsk8r, the game can be played on Newgrounds or played/downloaded for free on itch.io.
The plot of the game centers around Boyfriend trying to hook up with Girlfriend, but her ex-rockstar father Daddy Dearest doesn't approve of him. It's up to Boyfriend to rap battle his way through him and anyone else that stands in his way so that he can finally get freaky! Think you got what it takes?