Watch Robbie Williams Sing 'Let It Go' While His Wife Gives Birth

— -- British singer Robbie Williams is a dad again, this time to a baby boy, weighing 8 pounds, 2 ounces. He joins Williams' daughter, Theodora Rose, 2.

That's great, but what's even better is the "Candy" singer documented the entire birthing process with his wife, Ayda Field, and the two enjoyed every minute of the experience.

"I've never been more in love and never been more proud of my wife," Williams, 40, said in one of his videos after the birth Monday. "It's been a very emotional, amazing few hours. We are really happy and honored that you experienced the journey with us."

The journey includes amazing, funny videos that he posted to Twitter, where in one clip, he even sings "Let It Go" from the Disney movie "Frozen" while his wife, 35, literally is giving birth to their son. (The Disney Co. owns ABC News.)

Here's how it started, with his pregnant wife, 35, dancing to "Fancy."

Then, Williams does his thing.

He jokes!

"I know you're really concerned and worried ... I need you to know, I am doing great," he said.

His pants?

And finally, "Frozen."