It's the rumour that just won't die. Despite the fact that it's never happened at any time during the many years the rumour has been doing the rounds, people just won't let it die. It's like that whole second coming of Jesus thing. Kind of.
Anyway, yes, Justin Timberlake and Britney Spears are going to record a duet together with Timbaland. Then they're going to get married and have twelve babies and live in a big castle. A source told The Telegraph: "He's been sent her new music, and his feedback is really positive. She's strong again, and she wants Justin to see that. Musically she wants to blow him away".