A judge has dismissed a case by Britney Spears' former confidante that accused the singer's mother of libelling him and accused Spears' caretakers of failing to pay him a portion of her fortune.

Los Angeles Superior Court Judge Suzanne Bruguera ruled on Thursday that a lawyer for Sam Lutfi had not proven any of his claims in a case that centred on events before the singer's public meltdown more than four years ago.

Lutfi's side rested its case on Tuesday, but Bruguera agreed with arguments by lawyers for Spears' father and her conservators that there wasn't sufficient evidence to send the claims to a jury.

Lutfi had sued Lynne Spears for libel, the singer's father, Jamie, for allegedly hitting him, and her conservators for a 15 per cent share of the singer's earnings.