The song was made popular by David Brooks and Marion Bell in the musical Brigadoon. It was later performed in the 1954 film version by Gene Kelly.
There were three hit versions of the song in the United States in 1947. Frank Sinatra's version was the highest charting at #20. Mildred Bailey and Mary Martin both charted with the song at #21 that year.
Nat King Cole recorded more than one version of the song, including a later version that was used as the closing song in the 1993 movie Groundhog Day which starred Bill Murray. Cole's version, in the key of G major like the original, features a ii–V–I turnaround (2-5-1) in G and a 2-5-1 in E major and D major for the bridge, before eventually raising up a key with a 2-5-1 in A flat major.
Maybe the sun gave me the pow'r, For I could swim Loch Lomond and be home in half an hour. Maybe the air gave me the drive, For I'm all aglow and alive.
What a day this has been What a rare mood I'm in Why it's almost like being in love
There's a smile on my face For the whole human race Why it's almost like being in love
All the music of life seems to be Like a bell that is ringing for me
And from the way that I feel When the bell starts to peal I would swear I was falling I could swear I was falling It's almost like being in love