Britney Spears' former manager Larry Rudolph has fuelled speculation he has reunited with the troubled star by announcing she is set to make a triumphant comeback. 

The pop star dismissed Rudolph after he joined forces with her parents and staged an intervention to get Spears to enter rehab at the beginning of 2007.

But, according to PageSix, the music svengali has now re-entered Spears' camp, meeting with the singer four times over the past few weeks and reporting "huge improvements in her". 

He tells MySpace Celebrity: "She's still got a comeback in her. She's in great shape, I mean really great shape. 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." 

As for her recent stint on TV sitcom How I Met Your Mother, Rudolph insists Spears loved her return to the spotlight: "It was a really positive experience for her. She talked about it quite a bit the last time I saw her... She wants to do it again."