Why did Timberlake and Diaz split?

According to a recent report, the break up was because the singer cast Johansson in one of his music videos ...

The real reason behind Cameron Diaz and Justin Timberlake's split has been revealed.

According to a recent report. the break up was because the singer cast Scarlett Johansson in one of his Music Videos.

Stories of the Sexyback Singer being romantically linked with Johansson were already making the headlines, but the couple whore four year bond came to an end shortly before Christmas, allegedly broke up when Justin chose Scarlett to play his love interest in the promo for his song What Goes Around, reports Hollywoodrag.com.

Sources tell Britain's Heat magazine that Timberlake's casting decision was the final straw for a furious Diaz to finally walk out of the relationship. "When Justin cast Scarlett, Cameron felt it was the first time another person was involved.
She can get very angry and very jealous. When she knew the other person was possibly Scarlett, she was furious.

The two women have never been good friends, plus Scarlett had a relationship with Jared Leto, who Cameron had previously dated for four year," said an insider.

Meanwhile, since the break-up, Cameron has recently been spotted with champion surfer Kelly Slater, While apart from being linked with Scarlett Justin is also rumoured to date Ex-girlfriend Veronica Fin.

In other news, Justin and Scarlett were recently spotted partying together at the post-premiere party of his new film Alpha Dog at the exclusive Social Hollywood club.