It's like they do a quick search for "psy" on pixel2life, grab the first 3 results and follow the tutorials (or even better, just steal the .psd files from the examples). Then they paste a big-ass text with the artist and album title. VoilĂ !
Edit: Wow, that's weird, they even have fruityloops tutorials. Now they can make the cover AND the music on the same site. 2 birds with 1 stone people!