It was driving me crazy, too!
It's 'Lovin' Each Day' by Ronan Keating.
Lyrics can be found at www.lyricsgetlyrical.com.
Song can be found on his CD 'Destination' (I think), but it's an import, hard to find, and pretty pricey (couldn't find on Best Buy site, but Barnes and Noble and Borders both have it...)
Hope this helps.