Britney Spears asked her former nanny to sleep in the same bed as her, it has been reported.The 'Toxic' singer is said to have begged the employee to stay with her and her son Sean Preston because she felt lonely.Other former nannies have claimed Britney enjoyed stripping naked and drank alcohol in front of her children, 23-month-old Sean Preston and 11-month-old son Jayden James.A source told Us Weekly magazine: "Before Britney had Jayden James last year, she asked a nanny to sleep in the same bed with her and Sean."She also drinks in front of the kids. At first, the drinks would help her loosen up and not be so angry. But she'd inevitably drink too much and be out of it, at which point the nannies would take care of the kids."Britney will strip down in front of staff, nannies, whoever. She'll ask, 'Do I look sexy? Do I look pretty?' She is extremely insecure. She hires people to be her friends."The revelations emerged after Britney's ex-husband Kevin Federline began collecting evidence from former employees and serving subpoenas to her staff in his battle to win primary custody of their children.The 25-year-old singer's former assistant, Shannon Funk, her ex-bodyguard Daimon Shippen and her cousin Alli Sims have all been ordered to testify so far.