It’s not written in the stars and not necessarily something you’re born with: A new scientific paper, interpreted by Scientific American, indicates that people’s moods can strongly influence their moral judgements and decision making.

What does this mean? Well, it might offer an explanation for Justin Bieber’s erratic behavior of late. He’s been canceling concerts, causing a ruckus in a London nightclub, over Tweeting his feelings and generally getting his bad boy behavior on — very unlike the young, sweet Bieber of the “Baby” days. In part this is the kind of behavior we should expect from a 19-year-old kid. While his peers get to hide their misdeeds in anonymous lives at college, Bieber is living out his transition into adulthood in the spotlight. Between his very public break up with longtime girlfriend Selena Gomez and constant surveillance by the paparazzi, Bieber can’t seem to catch a break.

Jada Pinkett Smith took to her Facebook page, posting a split photo of Bieber, Rihanna, Taylor Swift and young Oscar nominee Quvanzhané Wallis along with a note questioning the media’s cyber-bullying of these young stars.

“Is it okay to continually attack and criticize a famous 19-year-old who is simply trying to build a life, exercise his talents while figuring out what manhood and fame is all about as he carries the weight of supporting his family as well as providing the paychecks to others who depend on him to work so they can feed their families as well? …Are these young people not allowed to be young, make mistakes, grow, and eventually transform a million times before our eyes?”

There are a myriad of reasons Bieber and Rihanna might be in a worse mood than is normal. Such as…

Read more on Radio.com.

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