The Dancing With the Stars vet stepped in to direct after the 41-year-old GRAMMY winner took time off to care for his 3-year-old son, Noah, who is being treated for cancer.
"I'm a huge fan of Michael Buble. I think he's amazing," Hough told ET during an exclusive set visit last month. "His music is incredible. He's an amazing artist and a great guy, so to do this project and be a part of this for him is amazing."
Hough, 31, also revealed that his grandparents inspired the music video’s emotional love story, which features romantic dance sequences.
"My grandfather passed away last year and the last couple of years they danced every single morning together -- my grandma and grandpa," Hough shared. "They danced every single morning to the same song, and it was their ritual. Even the night before he passed, they were dancing together, and then he passed away that night. For me, that was like this beautiful story of everlasting love, and that's kind of what I wanted to tell."
"I Believe In You" is the second single from Buble's Nobody But Me album, which debuted last October.