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Scott-Lee told Mirror Online: "Steps is my life. It has been my life for the last 24 years, but being principal of the school is my day job.
"I can never switch off. Even when I'm with Steps, rehearsing or shooting a video, I'll be working on my laptop. It's become a bit of a running joke.
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"I have to flip between my Steps hat and principal hat, which can be really hard and stressful at times."
When she is at home in Dubai, she revealed she works six days a week at the school.
She said: "I focus on the day-to-day running of the school and the business side of things, while Johnny is the creative Âdirector and main teacher."