A parody by Weird Al Yankovic of the Avril Lavigne song "Complicated", track seven of his (as of this writing) newest album, Poodle Hat.
As with all of his parodies, this one uses the same music (in a different key though) as the original, and changes the words. It's among the funnier parodies on the new album, with such choice lines as "Why'd you have to go and make me so constipated?" and "How was I supposed to know we were both related?" and "Why'd I have to go and get myself decapitated?"
Also, like most of his parodies, as a standalone work (not considering its primary intent as a work of humor) it actually sounds better than the original song it parodies.