This link will brighten your weekend; it's a collection of videos inspired by the SNES game Mario Paint, which let you compose music. Some ingenious folks -- who either use an Internet emulator or the real thing -- compose their own versions of popular songs. The Idolator link says:
"In 1992, Nintendo released a program for its Super Nintendo system entitled Mario Paint, a cartridge bundled with a PC-style mouse that was probably ground zero for my interest in, um, digital art. But in addition to letting those without home computers sketch 16-bit masterpieces, Mario Paint also included a simple MIDI program that allowed players bleep and blorp your way through tunelets like this Mario-ified version of Rick Astley's "Never Gonna Give You Up."
That video is at the link; but my favorites are:
Kenny Loggins, "Danger Zone"
Journey, "Don't Stop Believin'"