Justin Timberlake Gives Sweet Shout-Out to Pregnant Wife Jessica Biel

Singer sends message to his pregnant wife at the iHeartRadio Music Awards.

While accepting an innovator award, the 34-year-old singer thanked Biel, referring to her as his "best friend and favorite collaborator."

He also alluded to the upcoming birth of their first child.

"I can't wait to see our greatest creation yet," he said. "Daddy's heading home right now to innovate and learn how to change a poopy diaper and get my swaddle on!"

Biel, 33, is expected to give birth any day now, though her exact due date is unknown.

The couple has been mostly mum about Biel's pregnancy since Timberlake announced it in January on his 34th birthday.