Britney Spears' cousin and former assistant Alli Sims has been barred from contacting the pop star.

Sims was once a regular at the Toxic hitmaker's side, but she now admits that since Spears' father Jamie took control of the singer's affairs earlier this year, she has not been allowed to have any contact with her cousin.

Sims was recently accused of attempting to profit from her relationship with the star, by selling off clothes, jewellery and accessories she was given as Spears' sidekick.

She tells New York Post gossip column PageSix, "I have no idea when I'll see her again. I miss her every day.

"When (Spears') dad gained control, he put some rules down... it's just best for her to not communicate with a lot of people. My main concern is her being Ok."

The move reportedly comes as Jamie Spears attempts to remove allegedly negative influences from his daughter's life, as she recovers from her breakdown in January.

Spears was also banned from seeing her former manager, Sam Lutfi, who was served with a restraining order in February ordering him to stay away from the singer and her family.