Timberlake dumps Diaz, dates Johansson?

Justin Timberlake has been secretly dating Scarlett Johansson after ending his relationship with Cameron Diaz, according to a newspaper report.

The Sexyback singer apparently split from Diaz at the end of 2006, before growing close to Scarlett when she recorded scenes for his new music video recently.

A source told the News of the World: "Things just didn't work out between Justin and Cameron. They decided to part ways - but they didn't tell anyone.

"He's got a tour coming up this year and wanted to concentrate on that, but it seems he's really hit it off with Scarlett while working on the video."

Timberlake and Johansson were spotted looking "intimate" when she attended the aftershow party for the premiere of his movie Alpha Dog in LA on Wednesday.

An onlooker revealed: "She walked in keeping her head down. When she met Justin they looked very close and chatted away for ages. There were other people trying to speak to Justin but he kept his attention on her for around an hour. They looked very intimate.

"But he's still trying to make it look low key - because he left with his mum Lynn later through a back exit."