4. Justin Bieber
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Stars Who Were Internet Viral Sensations In 2015!

4. 4. Justin Bieber
The 21-year-old teeny bopper sent the internet into a frenzy when full frontal nude photos were taken off him whilst on holiday with a lady friend in .... Whilst we couldn't get our hands on the OFFICIAL photos, it's quite clear from Justin's Instagram that he's never been one to shy away from the cameras!