The video of Stuart Mathie, 56, proposing to Michelle McGrillen, 43, on the 9:07 p.m. train from Glasgow to Hamilton has clocked up over 750,000 views so far.
A local choir belted out the Frankie Valli ballad "You're Just Too Good To Be True" as Stuart went down on one knee and popped the question to Michelle.
Online marketing executive Stuart said, "I wanted to propose to Michelle but I wanted it to be special. I wondered about the Trevi Fountain in Rome… or at the top of Ben Nevis. I had seen lots of stuff about flash mobs and I thought that might be a good idea. I contacted the SoundRoutes Singers in Hamilton and asked if they had any singers spare for a rather unusual performance.
"I thought I might get three or four but when they heard what the 'performance' was, they all wanted to do it," the dad-of-one continued. "I sent them pictures of what Michelle and I look like and they replied with their photos, so I would know who they were on the train. They shuffled about on the platform in twos and threes at Argyle Street as we went for the train. After we left Rutherglen, one person began singing randomly, then another, then they all burst into song."
Michelle's son Joshua, 16, posted the video online and it wasn't long before the congratulations came flooding in.
Michelle said she "couldn't believe it" when Stuart proposed but added that it's not entirely out of character for him: "When he went on holiday for a week, I received a card every day, with poems on it and it always ended with 'PS. I Love You.' He had arranged with a secretary to post me a card every day while he was away."
Watch the awesome proposal (and listen to some incredible harmonies) below:
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