JT and Cameron split and the rumors were that he and Scarlett Johansson had hooked up. Apparently JT personally cast the Sexiest Woman Alive as the femme fatale in his new $1 million video, What Goes Around. Scarlett is more known for her A-list movie roles, but rumor has it she's had a crush on JT for quite awhile and was just waiting to make her move. US Weekly reports:

“Scarlett has always liked Justin. They’ve always had a flirtation – that’s why Cameron was threatened by her.”

With good reason. The decision to cast the 20-year-old as the video vixen pushed Timberlake's relationship with Diaz to the breaking point, and paved the way for Johansson to move in for the kill.

“She could not believe he went behind her back to put her in the video," says a Timberlake pal. "Cameron was very jealous of Scarlett.”

Adds the source, “they definitely got together after she did the video.”

Indeed, sources in both stars’ inner circles tell Us the couple are in the beginning stages of a relationship and excited to get to know each other.

It's kind of hard to root for the couple under these circumstances. We thought JT and Cammie were a great pair but we kinda think JT and Scarlett are hotter together. Besides, they are closer in age so many think it's a better fit. Hopefully Cameron and Drew are helping each other through this difficult time. More pics of JT so