Her quest for fitness is now linked to her quest for career super stardom. “She wants to win an Oscar,� says another source. It seems as if she might be using Tom’s ex as her role model. Katie was seen eagerly schmoozing with ultra thin Nicole Kidman – who landed an Oscar in 2002 for The Hours – at the Vanity Fair party. “I think Katie feels she needs to be skinny to be successful,� says the source. You could call it ‘Oscar Fever,’ the figure-ravaging syndrome that’s infecting more and more ambitious actresses – with horrifying results! “It’s almost like a psychological

In other news, Tom Cruise can't bear to leave Katie Holmes side - even when she's working, it has been reported.

The Mission Impossible star will allegedly travel to the set of wife Katie's new movie Mad Money when filming begins in Louisiana next month.

A source told the New York Post newspaper: "Tom has called producers and told them he will be on set every day.

"He wants to observe what's going on and will probably help Katie out."

Producer Jim Acheson said: "I don't know if that's the case, so I can't confirm. We are happy to have both Katie and Tom on set."