close friends of mine know how i feel about the corrs. (it has nothing to do with jealousy, i've had my opinion long before the two were linked as friends.)
but regardless, i don't think the two are anything but friends. i think he sees her as a little sister or a daughter, he's ultra-affectionate to everyone. anyone remember that oh-so-controversial pic of him with one of the gallaghers (i forget which one, lol)? and i think she sees him as a big brother or even a father. when i saw part of the clip of them singing, she seemed to look up to him, not like all seductive or anything.