Rak-Su got "great advice" from Little Mix.
The 2017 'X Factor' champions have just finished a huge arena tour with fellow winners Little Mix, and the 'Black Magic' hitmakers helped keep the relative newcomers "grounded".
Singer Ashley Fongho told The Sun newspaper's Bizarre column: "They were great to be around. They've been really helpful in terms of just keeping it grounded.
"We got to play huge shows, but when we weren't working we went bowling with them or to the cinema, things like that.
"Little Mix and One Direction both became absolutely massive from the show but it isn't necessarily like that any more, things have changed -- it takes hard work. But they gave us great advice."
The boyband - whose lineup is completed by Myles Stephenson, Jamaal Shurland and Mustafa Rahimtulla - have acknowledged the need to not rest on their laurels, and instead keep working hard since winning the TV talent show.
Myles - who has been in Los Angeles with his bandmates as they prepare for their debut LP - added: "['X Factor'] has given us an amazing platform but we need the songs to stand on their own now for us to cement our place in the business.
"We've been working on the new material for months and months, probably about 70 songs in total, so the time has come to start letting people hear it.
"It's nerve-racking and I'm feeling the pressure -- we all are -- but we have worked hard and we believe in it."
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