I had to check that song while the english name was not familiar - of course I recognized it - but in the video she stands near hilltop w only spruce etc at about 1-200 yards distance - then all of sudden she's in middle of birches - WOW - where did they popped up from.
Then again - Disney has Donald and Mickey who dress prtially up and speak human languages - so maybe them birches just hurried up to be there . . .
But boy oh boy - they surely were quick to grow their roots into soil in just few seconds. . .