Check out videos like this: http://www.youtube.com/watch?v=9zn7B0PqAp8
An example of a parody would be "White and Nerdy" by Weird Al, which is a parody "Ridin" by Chamillionaire. A parody is basically a spoof.
Venetian princess or rucka rucka teevee on YouTube.Many songs by Weird Al Yankovic are parodies.
Heavy sentences after a parody of justicebad sentence
Try some of the songs by Weird Al Yankovich, Rucka Rucka Ali, Tomster, or GoBlueKillRed. These guys can be found on youtube.