The fashion designer ramped up the glamour whilst promoting car manufacturer McLaren's sponsorship with Santander, posing alongside Formula One driver Jenson Button.
Myleene totally stole the show as she perched on a racing car, sporting a red figure-hugging frock with a sweetheart neckline.
And the starlet even kicked off her heels and took to the driver's seat, tweeting: "@jensonbutton just asked me to park this for him. #womendrivers #santander #studentrailcard".
She later added: "Just found out the hard way why racing drivers don't have hips."
Perhaps that's what her and Jenson couldn't stop giggling about?
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