Several years ago, there was a site of which you entered your birth date, you could find out the weather on that day. Now, in This Day in Music, when you enter your birth date, you will immediately know the top songs in UK, US, and Australia pop charts. Simple idea but attractive enough for you to use it. Another site everyHit not only provides information about the songs/albums; but also shows you the list of artists who share the same birth date with you.