Simon Cowell fears 'untamed' Britney Spears
Britney, 30, caused a stir again last week after walking out of auditions for the third time.
However, Sinitta, 43, has assured Simon he's made the right move.
She tells Now: 'Whether it's car crash or not, people love Britney.
'She'll freak him out, which'll be fun. And she'll put him in his place which, coming from a diva like her, will make Simon scared.'
Sinitta reckons Simon, 52, will soon be bowing to Brit's demands.
She says: 'Britney will have Simon wrapped around her little finger because he's better with someone untamed.
'It's taken me years to realise that.'
Read more celebrity gossip in Now magazine dated 25 June 2012 - out now!