A happy, dream-like mood setting song?

I'm making a short film/doentary for my video cl and I have a segment where a person is riding a bike all merrily and happy and I'm trying to think of a song that I once had in mind but completely forgot the lyrics to (what's worse is I never knew the title, only a few of the lyrics). To put it in perspective, the segment is going to be of how a series of events was supposed to take place, in this person's mind anyway, and then be interrupted by what actually happened. The song I know is similar to U2's song, Beautiful Day, but not quite, but along those lines. Any ideas of what songs are like this that I might have originally been thinking of?