It's coming on Christmas, they're cutting down trees
They're putting up reindeer and singing songs of joy and peace
Oh I wish I had a river
I could skate away on
I wish I had a river so long
I would teach my feet to fly
Robert Downey Jr. plays Joni Mitchell's 'River' in Ally McBeal's episode (4x6, Tis The Season)
The song from Mitchell's famous album Blue (1971) has been covered by many artists including e.g. Holly Cole, Sarah McLachlan, Indigo Girls and Shawn Colvin.