Do you know songs which sound so similiar to another, more popular one that it's irritating you. I don't mean the famous cases of plagiarism that were fought over in courts. I mean the ones that seem to have fallen under the radar and you feel as if you were the only one that noticed the similarities. Similitaries for example concerning a very characteristic riff or even parts of a melody.
Here are some examples I can give you (The year of release determines the status as either "Original" or "Secret Sibling"):
Original: ("Tie A Yello Ribbon..." - Tony Orlando)
http://www.youtube.com/watch?v=rBL2kzKg4nY
Secret sibling: ("Save Your Kisses For Me" - Brootherhood Of Man) http://www.youtube.com/watch?v=Szavq0lrFtg
Original: ("Queen Jane Approximately" - Bob Dylan)
http://www.youtube.com/watch?v=EgnXxtuusLs
Secret sibling: ("Brooklyn Owes The Charmer..." - Steely Dan) http://www.youtube.com/watch?v=32sM47dytt0
Original: ("Tush" - ZZ Top)
http://www.youtube.com/watch?v=9KbcYnP2ZWQ
secret sibling: ("No Class" - Motörhead)
http://www.youtube.com/watch?v=ZWJ5dtF6X4I
Original: ("By Tonight" - Mott)
http://www.youtube.com/watch?v=ipPu8GzdmzE
Secret sibling 1: ("Start Me Up" - Rolling Stones)
http://www.youtube.com/watch?v=XW4DPIBO5OU
Secret sibling 2: ("Love Removal Machine" - The Cult)
http://www.youtube.com/watch?v=qaK81oUmbbs
Original: ("After Laughter Comes Tears" - The Robocop Krauss) http://www.youtube.com/watch?v=G7dgH3FmCBE
Secret sibling: ("Blue Tip" - The Cars)
http://www.youtube.com/watch?v=fpJQWGA1O8s
I know there's loads more out there...