This Morning fans couldn't believe their eyes as boyband Hanson appeared on Tuesday's edition of the ITV show.
Isaac, Taylor and Zac Hanson, who first found fame back in 1997, joined hosts Holly Willoughby and Phillip Schofield in the studio to talk about their new music.
The trio have released six albums since their 1997 debut and now have 15 kids between them.
Lead singer Taylor, 39, has seven children with his wife Natalie, while youngest member Zac, 36, has five and oldest member Isaac, 41, has three.
The three siblings appeared on the ITV daytime show to promote their new track Child At Heart.
Speaking about the lengthy success of MMMBop, they said: "One of the things that made it work for us, is that it was our song - it wasn't somebody else's idea."
They explained: "When you're writing your own music, you're thinking about it like 'what will my music be? what will people be getting from that?'"
However, viewers tuning in at home were more interested in their appearance and were torn about their look.
Taking to Twitter, one person wrote: "Jordan 'Taylor' Hanson is so pretty! He always has been #ThisMorning #Hanson."
Another said: "Not a wrinkle between them #hanson #ThisMorning," while a third joked: "That one with the suit looks like he's just popped out of the office for lunch #Hanson #ThisMorning."
Someone else posted: "Hanson don't have a signature look do they? #ThisMorning," while another said: "Since when did the oldest one from Hanson get so good looking.. I remember three geeky lads with long hair @thismorning #Hanson #ThisMorning."
A different viewer asked: "What have you done with the real Hanson, they can't be that old now surely #ThisMorning."
And someone else tweeted: "This isn’t Hanson - what have you done with the real Hanson boys ? #ThisMorning."
This Morning airs weekdays at 10am on ITV and ITV Hub.
