Eamonn Kilbride (46) was celebrating with colleagues at their Christmas party in Blackburn, in England, when he suddenly suffered a heart attack last Saturday.
The Dubliner had performed the vigorous dance moves from the well-known Korean music video just moments before he collapsed with chest pains.
His devastated wife Julie, who was at the party, paid an emotional tribute to her husband.
"I want people to know how he would help anybody, whether it was a life-long friend, or someone he had just met.
"He was a great family man and he worked so hard. Eamonn was always the life of the party and loved dancing," she said.
Ms Kilbride, who was married to Eamonn for 23 years, was also celebrating her birthday when she saw her husband drop dead on Saturday night.
"We were having a fantastic time at the Christmas party and Eamonn had just finished dancing to Gangnam Style. He was entertaining everybody. He said he had a bit of a pain and just collapsed.
"I tried to revive him until the ambulance got there, but by the time he got to the hospital he was gone," she said.
Eamonn's funeral is due to take place in Burnley next Wednesday.
The dad-of-three, who worked as an IT manager, moved from Dublin to Burnley in 1985.
His children -- Laurajade (22), Jack (21) and Conor (18) -- are all studying in UK universities.
Conor described his father as a "fun-loving man".