Vettel naturally let his hair down on Sunday night in Suzuka in the wake of becoming the youngest back-to-back and two-time champion in Formula One history.
The 24-year-old even belted out Beatles classics 'Hey Jude' and 'Yellow Submarine', as well as Frank Sinatra's 'My Way' on the karaoke as the drinks flowed.
However, it was when seven-times champion and close friend Michael Schumacher turned up that Vettel's night took a turn for the worse.
"After the race there were a lot of things to do, but once we got beyond that, and once I found myself in the bar with the boys, we enjoyed that night very much," said Vettel.
"We had a very good time, did some karaoke, and it was a very good night, very special.
"After a couple of drinks everyone was quite happy, and then some time in the night Michael came as well and we had a couple more drinks together.
"I think after he came I felt much worse as I started mixing a bit, which wasn't the best strategy, but all in all it was a fun night.
"The funny thing is, I'm usually in control when it comes to not showing my German accent too much.
"But after a couple of drinks it was quite obvious where I come from."
The after effects were still being felt the following day, despite a sponsorship engagement in Tokyo.
It was not until Tuesday, and after finally getting rid of his hangover, that Vettel began to appreciate what he had achieved.
"At the sponsor's event I wasn't as fit as usual maybe, I was still quite tired," added Vettel with a grin, ahead of this weekend's Korean Grand Prix.
"But then on Tuesday I had a bit of time for myself, allowed myself to let things sink in a little more.
"Obviously there's a big difference compared to how I won the title last year when we did it in the last minute.
"We always kept believing, getting it done at the very end. We never led the championship until after that race.
"This year it has been a different story, leading from start to finish."
However, his third place in the Japanese Grand Prix was not the way he wanted to clinch his second crown, something he aims to rectify at the Korea International Circuit where he maintains there will be no let-up.
Vettel said: "When I crossed the line we knew we could have done a little better, and always you have the freshest emotions in your head.
"We would have loved to have won, so we are out again this weekend aiming for another win.
"Of course, the championship is decided, but it doesn't change our approach."
Schumacher, who dominated F1 in the early 'noughties' when he won five titles in a row from 2000 to 2004, appreciates another era of dominance is in the offing.
The 42-year-old has warned Vettel that the natural reaction will be for his rivals to redouble their efforts in trying to stop him.
"They (Red Bull and Vettel) have a very good chance of winning races and championships in the future," said Schumacher.
"Despite that I'm sure teams such as McLaren, Ferrari and ourselves will challenge them.
"The more one team wins, the more other teams get hot and excited to be closer and beat them again."