Britney Spears could make the "biggest comeback in history"

Britney Spears' former manager Larry Rudolph believes the troubled star is in an "amazing position" for a comeback.

Rudolph -- who is credited with discovering Spears and managing her career for 9 years -- says he has been spending a lot of time with the Toxic star recently and believes that she has now recovered from her recent troubles.

"She's still got a comeback in her. She's in great shape, I mean really great shape," Rudolph told MySpace Celebrity. "She's in an amazing position for a comeback right now. She could end up being the biggest comeback in history.

"The public, for a while, was throwing darts at her. I think the tide turned and people started to understand what was going on with her. Everyone is rooting for her. Everybody wants to see her get through it... to see Britney back on stage. She is the world's greatest entertainer."

He also confirmed that the 26-year-old mom-of-two is keen to make another guest appearance on CBS sitcom How I Met Your Mother. Her original cameo on the program was praised by critics and fans last month.

"It was a really positive experience for her," Larry said. "She talked about it quite a bit the last time I saw her... She wants to do it again."