Kelly Osbourne ’s 2-year-old grandson Sidney is hopping on his late grandfather’s crazy train.

Indeed, Ozzy Osbourne ’s grandson, whom Kelly shares with fiancé Sid Wilson , 48, proved he’s keeping the “Crazy Train” singer’s rocking spirit alive by channeling one of his most infamous moments in time for Halloween.

In Kelly's Oct. 30 TikTok video , Sidney, wearing a skeleton sweat set, is seen holding a stuffed bat toy with a removable head and pulling off the head with his teeth, sweetly laughing after the funny moment all while holding a pacifier in his hand.

Kelly—who added Ozzy's hit "Crazy Train" over the video—added in the caption, "Learned from the greatest, Papa!"

Of course, the 41-year-old is referring to the moment back in 1982 when Ozzy bit the head off of a

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