The actress wowed the red carpet in a black-and-white Tom Ford number and was more than happy to reveal she had bought it "off-the-rack" rather than send her stylist chasing the designer for a freebie.
She explained, "It's the first time I've ever worn him, because I've been begging... I feel sexy in it, I feel comfortable in it, and I'm in Tom Ford. I would wear a plastic bag if it was designed by him."
Ford, who dressed Naomi Watts for the Globes, was so taken by Panettiere's dedication, he sent her a floral gift and a note thanking her for her kind words about him.
Tweeting a photo of the bouquet and message, the actress wrote, "Such an honor to wear one of this man's masterpieces! Thank you for my beautiful flowers!"
Ford's note read: "Dear Hayden, You looked beautiful last night. Thank you for your kind words. Much love, Tom."