Tottenham produced an outstanding performance to brush aside Everton and move two points behind second-placed Manchester City in the Premier League.
Mauricio Pochettino's side had to come from behind at Goodison Park after Theo Walcott swept home Dominic Calvert-Lewin's low cross from Gylfi Sigurdsson's defence-splitting pass.
Everton's lead was short-lived as Son Heung-min produced a sublime equaliser from a tight angle following a mix-up between Kurt Zouma and Jordan Pickford.
Dele Alli put Spurs ahead for the first time after reacting first to Pickford's save from Son, then Harry Kane made it 3-1 when Kieran Trippier's curling free-kick hit a post and rebounded into the England captain's path.
In an entertaining game, Christian Eriksen's sublime first-time shot extended Tottenham's lead before Sigurdsson scored a consolation against his former club.
Son added the fifth and produced the cross for Kane to make it six, yet victory came at a cost for the free-scoring visitors.
Alli was forced off after a challenge with England team-mate Pickford, which former Three Lions captain Alan Shearer described as "disgusting".
Spurs are five points ahead of Chelsea and Arsenal, who are fourth and fifth respectively.
Tottenham head into the Christmas programme with speculation continuing about the future of manager Mauricio Pochettino, who has been linked with the permanent Manchester United job following Jose Mourinho's dismissal.
Yet for all the talk about Pochettino, Spurs remain in rude health on the pitch after following up a Carabao Cup victory over north London rivals Arsenal with a stunning fourth straight league win.
Not only are they in the last 16 of the Champions League, Tottenham have a Carabao Cup semi-final with Chelsea on the horizon and are third in the Premier League - six points behind leaders Liverpool.
They were just too good in front of goal at Goodison, and once they had recovered from falling behind there was no looking back.
Everton 2-6 Tottenham: Mauricio Pochettino praises 'fantastic performance' While Son's goal from the tightest of angles to make it 1-1 was a superb piece of skill, Eriksen's sensational finish from outside the box was breathtaking.
That made it 4-1, yet Spurs were still not done.
Son shot through the legs of Pickford to make it 5-2 after Sigurdsson had reduced the deficit before man-of-the-match Son played a deft low cross for Kane to slide in and steer into the corner.
This was Tottenham's ninth Premier League away win of the season - and 14th of 2018.
While they are in this formidable form, they are very much in the title race.
It has been a year to remember for Pickford, who was a key figure during England's run to the World Cup semi-finals in Russia.
However, this was a day to forget for Everton's keeper.
Six minutes after the hosts took the lead, Son was allowed to equalise after Pickford came charging out of his area and ran into team-mate Zouma.
At 1-1, the former Sunderland stopper did well to keep out Son but will perhaps feel he should have done better with the follow-up from Alli.
Then came a moment of controversy as Pickford, with the whistle already gone, challenged Alli, who had continued playing.
Alli failed to appear at the start of the second half, with Shearer claiming Pickford should have been sent off before adding on Twitter: "Pickford lucky Dele didn't react."
Everton go into Christmas on the back of their heaviest defeat under Marco Silva, without a win in five league games and having conceded 11 times in three matches.
The games come thick and fast and a quick response is required at Burnley on 26 December, and at Brighton three days later if they are to stay in the hunt for a top-six finish.
The day had started so well, with Walcott's first top-flight goal since August, before descending into utter chaos.
It might have been different had Dominic Calvert-Lewin's header, which would have made it 2-0, not been ruled out for a foul.
Instead Everton have one fewer point after 18 games under Silva this season than after the same number of games last season following the dismissal of Ronald Koeman and the appointment of Sam Allardyce.
Everton boss Marco Silva: "I'm not here to find an easy excuse. It would have been 2-0, it [the alleged foul] doesn't look anything special. I don't know if it would have been the same in the other box.
"A second goal for us would be different for sure. In that moment the referee saw something I did not see. I can't see anything there.
"The first goal we conceded is impossible. It [defensive error] happened with our team in the last game.
"We have to realise why it happens so many times with us."
Tottenham boss Mauricio Pochettino on why 6-2 is a special scoreline: "It's my present for my wife.
"We got married 26 years ago. And a fantastic way to celebrate tonight."
On Deli Alli's injury: "He didn't feel a big problem. Maybe a little bit tired from Wednesday. I hope it's not a big issue. It was a precaution."
