Cobra! always said the song Mercy sing by Dafty was a rip-off of one of the songs in Crash Bandicoot and I believe he was right. I googled "Duffy Mercy Crash Bandicoot" and i found some people complaining that the song sounds a lot like a level in Crash Bandicoot. Looks like Cobra! isn't the only one and he is right.
Here's a few comments i found from some forums complaining about the rip-off and the horrible singing...
AngelRasmus said: "argggggggggghhhh! fucking irritating song and an incredibly obnoxious
voice. also, this song sounds uncannily like the music for a Crash
Bandicoot level, The Generator Room!!!!"
Aileen said: "It is soooooo the music from Crash Bandicoot!!!!"
and a lot of results said "Mercy Duffy "Mind over mutant" Crash Bandicoot"
So by the looks of it, Mercy really is a rip-off from a Crash Bandicoot. People seriously have no imagination these days.