Driving her crazy! Heidi Klum puts on a playful display with Simon Cowell as she pretends to strangle head judge at America's Got Talent launch event

Heidi Klum had a spring in her step as she showed up at NBC Universal's Summer Press Day on Friday in a keyhole dress that bared her shoulders and gave a glimpse of cleavage.

The blonde model and TV personality arrived at the event in Westlake Village, California, to promote the upcoming season of America's Got Talent.

The 42-year-old judge put on a playful display with head judge Simon Cowell, pretending to wring the music mogul's neck in frustration during a fun-filled panel interview.

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Simply stunning: Heidi Klum modeled a perfect spring dress as she arrived at an event on Friday to promote the upcoming summer season of NBC's America's Got Talent

Simply stunning: Heidi Klum modeled a perfect spring dress as she arrived at an event on Friday to promote the upcoming summer season of NBC's America's Got Talent

Driving her crazy! Heidi put on a playful display with head judge Simon Cowell, pretending to strange the music mogul during a lighthearted panel interview 

Driving her crazy! Heidi put on a playful display with head judge Simon Cowell, pretending to strange the music mogul during a lighthearted panel interview 

Simon appeared unfazed by Heidi's surprise attack, no doubt used to causing controversy with his frank comments and unapologetic honesty on the show.

TV's resident 'Mr Nasty' seemed in good spirits during the promotional event, rocking a very casual look compared to his glamorous fellow judge.

Heidi's white frock featured matching black and gray floral patterns set diagonally opposite each other on the left breast and right thigh. 

Getting along: Heidi smiled as she cosied up to judge Simon Cowell at the America's Got Talent panel

Getting along: Heidi smiled as she cosied up to judge Simon Cowell at the America's Got Talent panel

Casual: Simon sported a scruffy look and left his shirt unbuttoned

Casual: Simon sported a scruffy look and left his shirt unbuttoned

Reality show: The group laughed as they took questions about the new season

Reality show: The group laughed as they took questions about the new season

Panel: From left, Nick Cannon, Howie, Mel B, Heidi and Simon onstage at the NBC Universal press day in Los Angeles 

Panel: From left, Nick Cannon, Howie, Mel B, Heidi and Simon onstage at the NBC Universal press day in Los Angeles 

It was also backless and featured a zipper running down the back of the skirt ending at the knee, leaving a split to the calf. 

She added a pair of black stilettos with pompoms on the toes. 

The mom-of-four added a soft purple shade of nail polish on her beautifully manicured hands and wore her long hair in a high ponytail.  

Flashed some skin: The 42-year-old's backless keyhole frock also featured a zipper down the back and a slit in the skirt
Flashed some skin: The 42-year-old's backless keyhole frock also featured a zipper down the back and a slit in the skirt

Flashed some skin: The 42-year-old's backless keyhole frock also featured a zipper down the back and a slit in the skirt

Keep it chic in a Roland Mouret midi dress like Heidi

Heidi Klum looked sensational on the red carpet at the America's Got Talent event in California today.

Sporting a white embroidered cut out midi dress, the supermodel completed the look with a pair of feathered Olgana Paris shoes for a super chic monochrome look.

The so called 'X neckline' is set to be big for spring/ summer 2016. A riff on the off the shoulder trend, the X features cold shoulders and a halterneck combo. We love it on Heidi's Roland Mouret midi!

Follow the link on the right to buy this exact dress now then complete your look with her shoes (below).

Or if you're after the look for less, check our our edit of alternatives in the carousel below, including picks from Ted baker, Revolve and Asos!

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Floral theme: The white dress provided the backdrop for black and grey flower patterns set diagonally opposite each other on the left breast and right thigh

Floral theme: The white dress provided the backdrop for black and grey flower patterns set diagonally opposite each other on the left breast and right thigh

Put together perfectly: The model and TV personality added some black stilettos with pompoms on the toes and a soft purple manicure
Put together perfectly: The model and TV personality added some black stilettos with pompoms on the toes and a soft purple manicure

Gorgeous: Heidi looked stylish as she attended the NBC event

Trio of judges: Heidi was joined on the red carpet in Westlake Village, California, by her co-judges on AGT, former Spice Girl Mel B and comedian Howie Mandel

Trio of judges: Heidi was joined on the red carpet in Westlake Village, California, by her co-judges on AGT, former Spice Girl Mel B and comedian Howie Mandel

Smooch time! Lucky Howie got a kiss from each of the lovely ladies as they posed for photos

Smooch time! Lucky Howie got a kiss from each of the lovely ladies as they posed for photos

Heidi came on board America's Got Talent in 2013, after cutting her teeth as host and judge on Project Runway. 

She was joined at Friday's promotional push by her fellow judges comedian Howie Mandel, Simon, former Spice Girl Mel B and host Nick Cannon. 

The America's Got Talent judges and host appeared to be in great spirits as they chatted about the upcoming season onstage. 

All smiles: Howie and Heidi struck a pose on the red carpet

All smiles: Howie and Heidi struck a pose on the red carpet

Chic: The supermodel added black heels with feathered details
Chic: The supermodel added black heels with feathered details

Chic: The supermodel added black heels with feathered details

Also at the event was host Nick Cannon, 35, who was hard to miss in a bright patterned suit and fedora.

The ex-husband of singer Mariah Carey showed off his unique style in the bright yellow, black and white look.

Flair for fashion: America's Got Talent host Nick Cannon wore a bold patterned suit

Flair for fashion: America's Got Talent host Nick Cannon wore a bold patterned suit

Unique style: The host added white lace-ups with silver tips and topped off his ensemble with a black fedora

Unique style: The host added white lace-ups with silver tips and topped off his ensemble with a black fedora

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