This is the third post in a series called Friday Night Ripoffs(?). Here's the deal: every Friday, two songs, where one of them might very well be a gigantic ripoff of the other.

Commenter Uncle Joe McCarthy and C+L blogger Logan Murphy both piped up about this one. Did Green Day lift the riff for "Brain Stew" from Chicago, or is 5th fret, 3rd fret, 2nd fret, 1st fret, open something that just exists in the air? And what about Papa Roach?

Tell us what you think, and leave some suggestions for next week's plagiarism investigation in the comments.