Irish pop star royalty Westlife returned to the stage to perform their new single on Sunday night's Strictly Come Dancing results show - and viewers were saying the same thing as they sang together.
Kian Egan, Markus Feehily, Nicky Byrne and Shane Filan belted out their new single Starlight as guests on the BBC dance contest.
And fans were swooning as they noticed something about the boyband that formed back in 1998 and scored huge hits with singles including Swear It Again, Flying Without Wings, I Have a Dream and Seasons in the Sun.
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They observed that the lads barely seem to have aged a day.
"How is it that Westlife boys haven’t aged at all??" asked one fan on Twitter.
"Like fine wines them boys," commented another.
"Not one member of Westlife has aged a day in the past 20 years!" gasped another.

"Westlife don’t appear to have aged? Or, maybe, I HAVE aged and that’s why they appear not to have?" marvlled a fourth.
Westlife fans agreed it was great to have the band back on the telly.
"Cannot believe 30 year old me is still able to watch Westlife perform on TV. They are forever my first loves," said one.
"How dreamy are Westlife on Strictly," asked another.
"Westlife have had more comebacks than Rocky!" said another viewer.
Westlife disbanded in 2012 and reunited in 2018.
The quartet released their eleventh studio album Spectrum in 2019 and Hello My Love was their first single since 2011.
They will release their 12th studio album Wild Dreams next month.
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