John Legend & Chrissy Teigen Team Up With McDonald's to Give Back This Holiday Season

How do you make the RMHC heart? Start by forming a diamond with your hands, then point your pinky up and push your index fingers down. Teigen and Legend, who will use their platform to raise awareness of the challenge, showed fans how it's done here.

"It is such an incredible initiative (100 million!) and we are proud to be even a small part of it," the model tweeted. "The hashtag works both here and Instagram!"

The couple stopped by Good Morning America to discuss the initiative, and opened up about the devastating miscarriage they suffered in September.

"I definitely give myself permission to feel complete and utter grief," Teigen said. "Every day is so different. So when people ask me how I'm doing I always say I'm okay -- today."

"I didn't know that we could experience this grief and also share it, but when we did it really meant so much to so many people," Legend added. "And it was such a powerful experience for me to learn that. I'm just grateful that my wife was courageous enough to do it."

Teigen went on to note that she's received  "thousands of letters" from supporters. "The world is inherently good. I believe people are inherently good, and it's shown itself," she said. "As hard as it was, it is beautiful to see this side of it."

See the interview here.