Here are two of her songs; the first one, The Power of Love is obviously a cover, and the song used in the John Lewis advert. The second one, Home, is also lovely:
'Cause they say home is where your heart is set in stone
Is where you go when you're alone
Is where you go to rest your bones
It's not just where you lay your head
It's not just where you make your bed
As long as we're together, does it matter where we go?