The champagne would have been flowing freely as they embarked on their first night as popstars at The X Factor aftershow held at the exclusive five star Corinthia Hotel in central London.
But with chart success comes hard work - and Little Mix will be nursing hangovers as they woke up at the crack of dawn today for their first post-show interview.
By 7am, Perrie Edwards, Leigh-Anne Pinnock, Jesy Nelson and Jade Thirlwall had already tweeted that they were at the Daybreak studio ready for their chat with Kate Garraway.
Winners: Little Mix triumphed on ITV1 last night, becoming the first group to win X Factor
During their conversation with Garraway, Essex girl Nelson said their victory had not yet sunk in, revealing: 'I don't think it is ever going to sink in. Every week, we prepared ourselves to go out.'
Stars in the making: Perrie Edwards and Leigh-Anne Pinnock celebrate at the Corinthia Hotel
Winner's luck: Leigh-Anne switched into her heels, while Perrie still opted for her gold trainers she had performed in
Last night, the quartet made history as the first girlband ever to triumph on Simon Cowell's series.
The Syco boss was busy tweeting his support for the girls, despite not starring on the panel this year, saying: 'Congratulations to @LIttleMixOffic. And Paula as you can see, groups can win this show!
Over the moon: Tulisa Contostavlos wept onstage after her 'Little Muffins' were crowned winners
Glamorous: Tulisa opted for a more practical dress after struggling to sit down on the live shows
While Perrie and Leigh-Anne remained in their stage costumes, baby of the group Jade, 18, slipped into her jeans, red puffer jacket and Ugg boots after initially performing in a festive gold dress.
Where's Harry? Caroline Flack deflected attention from her romance with One Direction singer by attending with older male friend
Mentor Tulisa Contostavlos continued to show her support for her 'Little Muffins', attending the party.
Ecstatic: The moment Little Mix were told they had beaten Marcus Collins
Straight to work: Little Mix appeared on Daybreak and then again on Lorraine
The N-Dubz beauty also had her say on Twitter, writing: 'I know its cheese but I swear down,2nit (sic) has shown me, if u really believe in sumin n want it bad enough it can happen,u just need 2 believe.
Ready for another? Thirsty Xtra Factor host Olly Murs clutched an empty bottle
Obviously there weren't enough canapes at the party, as she later said: 'what do ya do after ur act wins the xfactor?...go 2 ur local kebab shop of course, wooooiiiiii....LOVE U #LITTLEMIX keep it real.'
Reunited: Craig Col'ton gives Marcus Collins his consolation prize - a squeeze
Chasing contracts: Sophie Habibis and Amelia Lily will have to fight to be signed after being eliminated
Runner-up Marcus Collins put on a brave face as he attended the swish venue, with Craig Colton offering some consolation squeezes.
The Liverpudlian hairdresser, 23, still has high hopes for his career, despite not winning, tweeting: 'Thank you so much to all those who supported me. I'm sure I'll be seeing you all very soon!!xxxx'
Think pink: Comeback kid Amelia Lily came third in third in the series
The 17-year-old reached the final and performed with Kelly Rowland on Saturday night, but was eliminated from the competition leaving just Marcus and Little Mix to sing last night.
However, the Destiny's Child star didn't materialise last night at the party.
Supportive: Louis Walsh attended with Tulisa - but Kelly Rowland and Gary Barlow were nowhere in sight
Engaged: Caroline Flack revealed on The Xtra Factor that Dermot O'Leary had popped the question to Dee Koppang
The Xtra hosts Olly Murs and Caroline Flack joined in the festivities, with 32-year-old Flack deflecting attention from her romance with One Direction star Harry Styles, 17, by attending with a male friend.
Westlife stars Nicky Byrne and Shane Filan donned their leather jackets to mingle with the reality stars, having taken to the stage at Wembley to bid farewell to fans as they go their separate ways.
Moving on: Nicky Byrne performed his farewell gig with Westlife at Wembley
A night away from the kids: Shane Filan and wife Gillian took time off from parent duties