Forbes made the list, not us! But we're betting these slebs won't be too pleased to find their names on this top 10 list of overpaid underachievers...

10 Tom Cruise
After Mission: Impossible III didn't live up to expectations and the flop that was Lions For Lambs, Tom's seen his box office worth take a skydive.

Tom's Worth: For every $1 Tom gets paid, his movies earn $11.

9 Will Smith
Tom's bud is a hit when it comes to his saving-the-world blockbusters, but his flops - The Legend Of Bagger Vance, anyone? - set his worth back.

Will's Worth: For each $1 of his pay, his films make $10.

8 Denzel Washington
He's scooped two Oscars and was paid twice for American Gangster, with a special deal, but Denzel's still considered overpaid for his box office returns.

Denzel's Worth: For each $1 he gets paid, his movies return $10.

7 Cameron Diaz
Her Shrek movies may be hits, but when Cam makes chick flicks like In Her Shoes and The Holiday, they drag her net worth way down.

Cam's Worth: Her films rake in $9 for every $1 she earns.

6 Adam Sandler
The comedy actor hits the big time when he sticks to what he knows in his mega-budget comedies, but falls short with his mushy movies like Spanglish.

Adam's Worth: For each $1 he gets in his paycheck, his movies earn $9.

5 Jennifer Lopez
J-Lo's big box office days are over after a string of flops which include Gigli - which didn't even make its budget back - Monster-in-law and Shall We Dance.

Jen's Worth: For each $1 that J-Lo gets paid, her movies earn $9.

4 Will Ferrell
The ‘Frat Pack' member scored big with Talladega Nights, but proved box office poison with Bewitched and Stranger Than Fiction.

Will's Worth: The funnyman's movies pull in $8 for each $1 he earns himself.

3 Jim Carrey
Jim's seen his once-stellar comedy career wash away after flops like Fun With Dick And Jane, to the extent that he's taking no upfront salary on his next film, Yes Man.

Jim's Worth: For every $1 in his pay packet, Jim's films average $8.

2 Nicole Kidman
Nicole's having a career crisis in the wake of seven flops - including Birth, Dogville and The Stepford Wives - over the past four years.

Nicole's Worth: The actress's movies earn around $8 for her every $1.

LEAST VALUE FOR MONEY!

1 Russell Crowe
Russ was box office dynamite after Gladiator, but Cinderella Man and his attempt at comedy (uh oh!) in A Good Year have hit his bankability.

Russ's Worth: The Aussie actor's movies gross a mere $5 for every $1 he gets paid.