Britney Spears & Justin Timberlake[ File photo]

The Toxic singer - who lost her virginity to Justin - is desperate to rekindle her romance with the SexyBack singer now she has filed for divorce from Kevin Federline and he has split from Cameron Diaz.

A source told the National Enquirer magazine: "Britney would love to have Justin back. They still talk a lot and she's been telling friends for months about how good Justin was for her."

It has also been alleged that Britney, 25 - who has two sons, 16-month-old Sean Preston and four-month-old Jayden James, with Kevin - started dating model Isaac Cohen in attempt to make Justin jealous.

The source added: "Britney gets an ego boost by parading her piece of eye candy around!

"Britney hopes Justin will think more of her now she's been seen with a successful guy like Isaac, because she isn't hanging out with a loser like Kevin anymore. She wants to prove she can still land a good-looking, desirable guy."

Since splitting from Cameron in December, Justin has been romantically linked to Scarlett Johansson.