"Season's Greetings," the card reads in a comic book-style font.
Fergie and Duhamel, 40, have a tradition of mailing out an annual holiday card, but in an interview with Ellen DeGeneres earlier this month, the singer admitted that she and her husband would have to scramble last-minute this time around.
"My husband orchestrates the whole thing and we're late this year because he's been filming a movie," she told the talk show host Dec. 10. "He just finished Safe Haven with Julianne Hough and now he's doing You're Not You with Hilary Swank."
"I haven't been on the ball, so I'm waiting for him and we're going to do something last minute this year."