Girl group Little Mix spoke of their joy after making history and becoming the first girl band to take the X Factor title.
Band member Jesy Nelson said their victory had not yet sunk in.
"I don't think it is ever going to sink in," she told ITV1 Daybreak. Nelson, 20, from Essex, added: "Every week, we prepared ourselves to go out."
Fellow band member Leigh-Anne Pinnock, 19, from London, said: "When he said Little Mix, it was 'My gosh, this is just insane'. We are so happy."
The group, mentored by Tulisa Contostavlos, were speaking after they scooped the crown in front of a 10,000-strong audience at Wembley Arena in north London on Sunday night, with millions more watching the ITV show live on television.
The band, made up of Jade Thirlwall, 18, and Perrie Edwards, 18, both from South Shields, Tyne and Wear, Nelson and Pinnock, beat 23-year-old Liverpudlian Marcus Collins to the title.
Thirlwall told the programme that their popularity had increased over the contest as people got to know them. Asked about reports that Simon Cowell believes they could become the next Spice Girls and a worldwide act, she said: "We would love to do that... We really look up to the Spice Girls."
Runner-up Collins said the band "really deserve" the title, adding that they were "amazing".
The girls, who had never met before being put together as a band, are representing different parts of the UK within the group.
They have walked away from the talent show with a recording contract and will now release their winner's single, a rendition of Damien Rice's Cannonball, in an attempt to top the charts with a Christmas number one.