On Sabotage, those experiments continued with Am I Going Insane (Radio), which was essentially a pop song, written by singer Ozzy Osbourne on a Moog synthesiser, which he played on the finished track.

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts.

Despite this, Kelly - who is the daughter of Ozzy and Sharon Osbourne - admits that it's also been a huge challenge at times. She shared: "It’s insane. I never get a second. I’m exhausted every night.

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