Tottenham secured Champions League qualification, denying north London rivals Arsenal in the process, with an emphatic victory over already-relegated Norwich at Carrow Road.
Spurs needed just a draw to seal a top-four finish, but ensured victory in stress-free fashion after first-half goals from Dejan Kulusevski and Harry Kane quickly dispelled any pre-match nerves among the travelling supporters.
Kulusevski added a third with a brilliant left-footed strike on 64 minutes before Son scored twice to give him a share of the Golden Boot, putting him level with Liverpool's Mohamed Salah on 23 goals apiece.
Spurs finished two points clear of Arsenal, whose victory over Everton ultimately proved inconsequential for European qualification.
Tottenham's return to the Champions League comes after a two-year absence, having participated in the Europa League and Europa Conference League in recent seasons.
Their qualification, helped by a 3-0 win in the north London derby on 12 May, will go down as a good ending to a turbulent season in which Antonio Conte was appointed boss following Nuno Espirito Santo's miserable four-month reign.
Conte's side confirmed their return to Europe's top club competition with minimum fuss as they swept aside a Norwich team already preparing for another season in the Championship.
Kulusevski later said: "Very good. This was exactly how I hoped it would happen and it's even better. We did what we had to do. The season is finished, I can't wait to go and celebrate with my family.
"We were very excited. it's never 100% sure in football. Anything can happen."
On Son Heung-min sharing the Golden Boot, he added: "I had a chance to shoot and saw Son and thought I can't shoot. We're very happy for him."
"I felt embarrassed about what happened before. I thought I can't finish the season like that. Those are my goals.
On coming off when he was chasing a hat-trick, he said: "I was just happy because the season was over. I did everything I could and I'm happy with how I played these four months.
"Antonio Conte is a winner. He does everything required to win. He's a role model. I want him to stay and be my manager."
