Naughty Little Mermaid (Little Mermaid Parody) (NSFW)
While the previous was somewhat worth it... this one is totally worth it.
B-ob edit of magic win. I should point out, that what amuses me most about this is not the content itself (Which, is admitedly laugh out loud funny) it's how close the person singing this got it to the original. The voice is almost spot on.
And I have the general tune stuck in my head. Me ftl.
-B