Jon said: "I'm doing eight shows a week for almost a year and it is going
to be tough, there's no doubt about it. It's going to stretch me.
"We'd only ever sing live when we were doing the concerts - we were
miming the whole time when we were on TV and whatever. With this I get to sing
live every night."
Bandmates to support him
Jon said he took the occasional lead vocal during concerts but to most people
he was "just the blond boy in the back doing the backflips".
Some of the former S Clubbers are expected to attend his opening night at
the Palace Theatre in London on Monday.
Newsround will be there to see how he gets on and will bring you a special report on Tuesday!
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Vote: The biggest S Club solo star?
Singing solo on stage was great!
