The pair, who will perform 'I'm Your Man' by George Michael this weekend, were home for the first time since reaching the finals of the UK talent show to film a community feature.
'X Factor' judge Louis Walsh shot down rumours his protégés John and Edward Grimes, known collectively as 'Jedward', were due to appear as Westlife turned on the Christmas lights on Grafton Street, Dublin.
However, the pop guru said he feels they have what it takes to become multi-millionaires in America.
In an exclusive interview with the Irish Independent, the pop impresario said offers were already flooding in for the twins who have captured attention with their dubious singing talents, energetic dancing and sky-high blonde quiffs.
"It could be TV. There's people talking about them doing phone deals, pantomimes, books, records, hair deals," he said.
"I think if they were in America they would be multi, multi-millionaires. Because they're so clean cut, they're so nice. They're unique. Everything about them," he said.
'Jedward' began their day bright and early in Dublin's Institute of Education with their old classmates and teachers.
But by yesterday afternoon the rumour mill was running at full tilt and around 200 people were left disappointed outside the boys' local supermarket in Lucan, having anticipated their arrival.
There was another anti-climax in the nearby Lord Lucan pub, which has been converted into a supporters' club for the 18-year-olds, when a supposed drop-in failed to materialise.
It is understood they spent most of the day with their family before departing for London at around 7pm last night.
Darragh Tuite from Blanchardstown and Stephen Fitzpatrick from Lucan, both 18, are friends with the boys and were looking forward to seeing them outside Superquinn for the first time since 'The X-Factor' began.
Superquinn are baking 'Jedward' cakes on a weekly basis and handing them over to customers in The Lord Lucan for the weekend show.
Source Irish Independent
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