The day I was born it was "Jack and Diane" by John Mellencamp. If only I'd been born two years earlier and I'd have had "Another One Bites the Dust" by Queen, a way cooler song.
The best song that's been number one on my birthday since I was born is probably "Money For Nothing" by Dire Straits. Mark Knopffler ftw. By far the worst song that was number one on by birthday is the Macarena.