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| Rihanna snubs Justin Bieber | 
Teen heartthrob Justin Bieber was reportedly stopped from talking to  Rihanna at the Billboard Music Awards by her security guards. The  17-year-old was allegedly left feeling upset when he was prevented from  meeting with Rhi Rhi, 23, after approaching the California King Bed  singer five times at the awards ceremony, which was held at the MGM  Grand Garden Arena in Las Vegas on Sunday. An insider told British  newspaper the Daily Mirror: "Justin thinks Rihanna is the most beautiful  woman and supremely talented. "He is in awe of her. Justin is just a  red-blooded teenager, he can't help acting like a love-sick puppy dog  when he's around her." The source added: "The pair were chatting as  Justin's girlfriend Selena [Gomez] looked on, scowling. Then Rihanna got  dragged away by a couple of her friends. "The pair resumed their chat  later but when Justin went to talk to her at the show's climax her  security blocked his path, telling him to 'leave it.' "Justin looked  mortified - he thought they were buddies."