Justin and Scarlett???

It all started when Star magazine reported that Justin Timberlake and Cameron Diaz had split up, propelled by rumours that they spent the holidays in separate cities, he in Memphis, she in Colorado.

Then Justin cast the newly-single Scarlett (she recently split from boyfriend Josh Hartnett) in his video for "What goes around", a song reportedly inspired by the bitter break-up between Justin's BFF, Trace Ayala, and 24 vixen Elisha Cuthbert.

Now rumours are floating that Justin and Scarlett were seen embroiled in conversation (sample dialogue: "you're hotter!', "no, you are", "no you!") at the after-party for Timberlake's new flick 'Alpha Dog'.

Mmm...sounds suspicious. The Cameron and Justin break-up coincides directly with Scarlett's presence in Justin's video. I guess we'll have to wait and see what kind of onscreen chemistry these two create when the "What goes around" video premieres.

Who knows? By then, both Justin and Scarlett could have moved on to better and hotter things... If that's even possible.