This Saturday will see the Take That-themed competition move on to the more challenging next level.
Lulu, who featured on Take That’s cover of Relight My Fire in the 90s, will join the panel as the new guest judge as Amber returns to the West End stage show of Dream Girls.
The 68-year-old singer revealed that the programme concept originally sounded dull and “generic”, but the detailing has brought the production up a notch.
"I think this whole show has a touch of something different,” said Lulu.
Let It Shine: First look at Lulu on Gary Barlow’s BBC show
It sounded, at the start, something that was going to be quite generic.
"It sounded, at the start, something that was going to be quite generic. I thought they would be looking for Take That look-a-likes, sound-a-likes, all of that.
"But then I came on set and wow, there's a lot of detail on this show that is pretty amazing."
Lulu believes the format has allowed a different type of talent to shine, adding: "I was actually very surprised, I wasn't expecting them to be as good as they are.
"It's not impossible, but it's hard to eliminate some of the boys because they all have something about them. You want the full package from everybody.
Let It Shine: Lulu on Gary Barlow’s BBC show
Theatre talent shows through the years
Wed, November 16, 2016
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As Gary Barlow launches new talent show 'Let it Shine' to find the stars of a Take That musical, we look at the successful musical theatre talent shows of the past.
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Let it Shine – The new BBC show will see Gary Barlow looking for five young men to star in a new Take That musical
"I'm sorry but that's what you have to have these days, you can't just be a singer or just a dancer or just cute. You have to have the full package because there is so much competition out there."
Happy that the end goal is a performing job rather than just fame, Lulu admitted that Take That have been successful due to their humility.
Lulu added: “They aren't full of themselves. They have a lot of humility and gratitude; they've had their ups and downs."