The 39-year-old star still looked her typical stunning self for the screening of new movie What to Expecting When You're Expecting in New York earlier this evening, but appeared to be suffering a little from the lights and heat.
A visible sweat patch appeared on the sleeves of the star's sheer white blouse as she posed for photographs on the red carpet.
Scroll down for video...


Working up a sweat: The actress was clearly feeling a little hot under the lightsIt was a far cry from her appearance at last night's Met Ball gala, where she looked every inch the Hollywood glamour girl with a floor length gold glittering gown and chic-up do.
But without Cameron's co-star Jennifer Lopez on the carpet to provide the glitz at tonight's event, it was left to model-turned actress Brooklyn Decker to be the glamour girl.
The 25-year-old Sports Illustrated model wore a simple white strapless dress with pared down gold jewellery.
Pared down: Despite her toned down make-up and outfit, Cameron still looked stunning at the screening

She plays an expectant mother in the movie alongside both Cameron and J-Lo, while Elizabeth Banks stars as an opinionated author.
The Hunger Games actress provided a little more old-school Hollywood glamour with a colourful optical illusion-style low cut dress with black fringed detail and sheer side panels.
The white stuff: Brooklyn Decker plumped for a strapless white gown for the special New York screening

Anna joined J-Lo, Cameron, Elizabeth and Brooklyn on the cover of Redbook magazine where they discussed their experiences an opinions on motherhood.
Cameron admitted she initially thought she would be a mother at the age of 21, but instead landed a plum role opposite Jim Carrey in hit film The Mask.




Stars of the show: Chace, Brooklyn, director Kirk Jones and Elizabeth posed for a cast shot before the screeningShe added: 'But then my career was starting to take off and there were still so many things I wanted to do.
'So that dream [of motherhood] for me was shattered early on. After that I never put another time line on anything in my life.'
New arrivals: Elizabeth Banks and Cameron Diaz both co-star in ensemble comedy film What To Expect When You're Expecting






Musical
number: Jane Krakowski filmed a typically theatrical spot for 30 Rock
with co-stars Judah Friedlander and Keith Powell yesterday
On a high: The actress performed a risky lift with the help of two dancers dressed as businessmen
Mind how you go! But she experienced a bit of trouble on the way down as she almost revealed her underwear
Look at me! The limelight lover was already getting plenty of attention outside the Rockefeller Center
Perfect pins: The blonde wore a buttoned down white shirt and mint min skirt
The Girlie Show: She plays Jenna Maroney on the hit sitcom with Tina Fey and Alec Baldwin
Yummy mummy: She is mother to one-year-old son Bennett who she has with her British businessman husband Robert Godley
Regular performer: She was recently seen strutting her stuff on the 30 Rock live episode
Big names: Tina Fey and Alec Baldwin help make up the show's star-studded cast
