Ozzy Osbourne reveals the adorable gift he wants to give his next grandchild

Rocker Ozzy Osbourne is not your typical grandfather, so it's not surprising his planned gift to his unborn grandchild is a little out of the ordinary too.

The Crazy Train singer raved about his daughter Kelly Osbourne's pregnancy while speaking to Entertainment Tonight at Comic-Con San Diego. 

"Kelly is big and she's beautiful and I love it," said Osbourne. 

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He also revealed his baby gift plans to reporters at the event: "the first thing that I'm gonna buy is a microphone."

In May, Kelly Osbourne and her partner Sid Wilson announced they are expecting their first child together.

"I am over the moon to announce that I am going to be a Mumma," she said. "To say that I am happy does not quite cut it. I am ecstatic!"

This child will be Osbourne's fifth grandchild, and is due to arrive in three months. 

Osbourne also provided an update on his health while speaking at Comic-Con.

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"I like to see people, you know," said Osbourne. "That's been the hardest thing of the past three years, because I've been trying to recover from my surgery. I'm getting there. It's a slow climb back, you know?"

He thanked his fans for all their support after he announced he was undergoing a "very major operation".

"I am definitely feeling the love and support from all my fans and sending everyone a big thank you for their thoughts, prayers and well wishes during my recovery," said Osbourne.