Who sings the song with the lyric if you could fall into the sky?

Vanessa Carlton in "1000 Miles" sings, "If I could fall/into the sky,/do you think time/ would pass us by?" Instances of this phrase occur from 01:01 to 01:11, from 01:57 to 02:06, from 03:19 to 03:29, and from 03:39 to 03:49 in the official music video.