House actress Lisa Edelstein has moved into the political arena as she takes on the G.O.P. in a new ‘right to choose’ ad made in conjunction with activist group MoveOn.org.

The 43-year-old, who plays Dr. House’s love interest, Dr Lisa Cuddy on the Emmy award winning drama, stars in a new 30-second TV ad as a woman who is forced into a “back alley” to undergo a pregnancy termination.

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The message is a direct attack on what MoveOn.org claim is the Republican party’s assault on women’s health and their right to choose.

The ad opens with Edelstein dressed in 1950s-era clothing walking shakily down a hallway towards a door as you hear her voice saying: “Decades ago, women suffered through horrifying back alley abortions. Or, they used dangerous methods when they had no other recourse.”

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And it ends with a terrified Edelstein, dressed in modern day clothing, tearfully opening a closet door to reveal a wire clothes hanger, a scene symbolically associated with the dangerous situations women were forced into before they gained reproductive rights.

Edelstein’s voice then asks: “Why is the G.O.P. trying to send women back to the back alley?”

The actress, who is an outspoken advocate for women’s rights, as well as a volunteer for the Best Friends Animal Society, Save the Children and Planned Parenthood, explained her decision to star in the ad: “I decided to do this ad because I believe that every woman needs to know the grave danger that women’s reproductive rights are facing in Congress right now,” she said.

“

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I hope that women across America tell Congress that these bills are an attack on women’s health and that they are unacceptable.”

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This ad is a wakeup call,” said Kat Barr, Campaign Director at MoveOn.org.  “If Republican proposals go through, women could once again face fear and danger when it comes to their reproductive health.

From the streets to the red carpet, stars were out and about on Monday dressed in the best and worst fashions. RadarOnline.com has all the photos in our daily feature‹where no celeb is immune to a fashion police arrest.

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Fresh from her Hawaiian vacation, Cameron Diaz radiated at the Los Angeles premiere of The Green Hornet. The blonde bombshell showed off her fab figure in a scarlet Azaaro number, which she paired with nude Casadei pumps and a delicate Lana Jewelry necklace.

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Stars sizzled and fizzled in summer style during the first week of August, stepping out on the streets and hitting the red carpet in the Best and Worst of fashions.

Who cares about The Other Guys, when Eva Mendes is on the red carpet? The hard-bodied bombshell got clad in truly fem fashion, rocking a hot-off-the-runway Oscar de la Renta party dress from the Resort 2011 collection with Sergio Rossi heels to the NYC premiere of her movie. Mark Wahlberg and Will Ferrell may have been in their most dapper duds, but there is room for only one Best Dressed of the Week on our list.

Just when we though Bjork couldn't trump her infamous Academy Awards swan costume, we spotted the Icelandic singer at the Finnish premiere of Moomins and the Comet Chase dressed like Shrek! Wearing a boxy and pouf-shouldered green dress with colorful tights and edgy booties, she definitely was not dressed to impress.

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Gwyneth Paltrow and Jessica Alba were casually chic on the streets. Both leading ladies are embracing the latest trouser trend, jazzing up the surplus staples with luxe jewelry, shoes and handbags.

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Pam Anderson showed a lot more than support at Baywatch costar David Hasselhoff's Comedy Central Roast, wearing in undeniably sheer black gown, while Taylor Momsen was the anti-Material Girl, exposing her belly in a bra top at Madonna's NYC clothing launch.

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From Selma Blair's stunning Stella McCartney appearance at the Middle Men premiere, to Bobby Trendy's beauty blunder at the Prop 8 celebration party, see all the Best, Worst and Wackiest Fashions of the Week by checking out the gallery in Style.

Lea Michele dazzled at the FOX All-Star TCA Party in Santa Monica, California on Monday, hitting the red carpet with her Glee girls in high fashion.  The star of the hit television show looked strikingly skinny in her tie-dyed Giambattista Valli strapless gown, which she paired with Christian Louboutin peep-toes.

PHOTOS: Will Ferrell, Eva Mendes, Flo Rida, Lisa Edelstein, Khloe Kardashian, Briana Evigan, Brittany Curran, Lea Michele, Leona Lewis, Ke$ha, Erin Andrews, Kendra Andrews, Naomi Watts, Hulk Hogan, Bjork, Emily Deschanel, Mischa Barton, Ali Fedotowsky And Emilio Masella In The Best And Worst

Though Bjork will never be able to trump her infamous Oscars swan dress, the Icelandic singer stepped out to the Finnish premiere of Moomins and the Comet Chase in nearly as frightening fashion!  Dressed more Shrek than chic, the singer paired her exaggerated-shoulder dress with color-fading blue and yellow tights, finishing the look off with awkward booties.

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Eva Mendes hit the streets in NYC, showing off her fab figure in Oscar de la Renta, while Khloe Kardashian got off on the right foot in crave-worth Gucci Sigrid platforms at the Casio G-Shock’s Shock the World event in NYC. Brittany Curran hit the red carpet premiere of Step Up: 3D in an anything but basic Quail dress (from Urban Outfitters!), while Erin Andrews showed some skin in a sexy Wayne cutout mini.

What sassy singer rocked blue lipstick, which didn’t exactly have our clock TiK ToK’ing?  Check out the gallery in Style to find out.