However Nicole will be fully prepared for the audition experience, having performed back in 2011 and made it all the way to Boot Camp when she was just 16.
The episode sees returning singer Tracy Leanne Jefford, who first auditioned for The X Factor in 2006, attempting to make her mark with a cover of Will You Still Love Me Tomorrow by the Shirelles.
The duo regularly busk on Grafton Street, and have a huge following of over 12,000 on Facebook.
Siblings Sean (17) and Conor (15) Price from Blessington in the Republic of Ireland offer a unique and modern rendition of Bob Dylan's All Along The Watchtower, which was famously covered by Jimi Hendrix.
"Your voice, Conor, is wonderful", said Nicole. Alicia Keys song If I Aint Got You earns the 17-year-old four Yeses - but judging by reactions on Twitter he might want to do something about his flappy hands. I feel your voice complements it so well.
Coutinho & Sturridge start against Burnley
Burnley's stubborn resistance left a dominant Liverpool frustrated on Philippe Coutinho's return to the Reds' starting line-up. They're heading to Anfield to take on Liverpool later .
Louis Walsh told them: "So young, so authentic".
Their performance was also deemed so good by Simon Cowell, he declared it "one of the best auditions we've had". "That means an terrible lot".
"If somebody does try to do that, come and talk to me".
He added: "Every so often I sit in these auditions and think... thank God we found people like you".