Paul McCartney is immensely talented, and the guy knows how to write a melody like nobody else can. Michael Jackson was also immensely talented, as far as singing, dancing, and even songwriting. For these reasons, I automatically rejected this song and video. It was during my "If it's that hugely popular, it can't possibly be any good" phase (which I've never really grown out of). I don't like being manipulated, and writing a song specifically to become a hit, to me, is a form of manipulation. The catchy melody, the catchy beat, the slick video... it's all designed to sell records. It took me a long time to accept that some people (such as Paul McCartney and Michael Jackson) are just so damned talented that, it's not that they're trying to write hits, they just can't help it. All their songs are great.
So yeah, it's a great song. Great melody, catchy, clever video, all that. And I still don't really like it, but that's my problem.