Liberty Mutual Insurance songThe group Hem wrote the songs 'Half Acre', 'The Part Where You Let Go', and others which are used in a series of Liberty Mutual ads. The singer is Sally Ellyson.
This particular 'carnival' LM ad originally aired during the Beijing '08 Summer
Olympics; the song is called 'Better Days', though it is apparently not complete nor available as a full song according to their website or any other source I could find. It lives right now as a 30 second jingle.
'There are better days to meet us where we stand.
They are gathering in fields and spreading out over land.
Then a drop falls, fills a bottle in our hands.'
That's all so far. I hope they finish it and release it soon.