Pop star, Justin Bieber, 17, sang to his girlfriend, Selena Gomez, on her 19th birthday this week, while his fans puked up their Lunchables in disgust at the saccharin spectacle. I’m just teasing, but he did sing to her and ironically, a song by a guy that slammed him.

Justin Bieber and Selena Gomez

Bieber sang Justin Timberlake’s "Cry Me A River" - which when you think about it, better not be a quiet diss. The song "Cry Me A River" is about singer Britney Spears cheating on Timberlake years ago when they were a couple. Exactly, what has miss Selena been doing!

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Justin Bieber Surprises Selena Gomez Onstage, Covers Justin Timberlake (Video)