Welcome to Geni justin Drew bieber.
For someone so popular, you're going to have to expect people to create copies of your tree. So it's not "fake" so much as "fannish". You might find the following link of interest:
Of course there ARE other people with your exact name, but quite a few of these are copies of your tree. If you would like help "merging" them to create a single tree, then just ask. As a Curator, I might be able to assist.
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