Mr. Mean's Good Deed is a book released in the early 2000s and is part of the Mr. Men New Library series.
It’s Christmas Eve and poor Little Miss Sunshine has a terrible cold! She is feeling miserable and her friend, Mr Worry, is worried she will be all alone at Christmas! What will happen when he asks Mr Mean to cheer her up?
https://www.youtube.com/watch?v=Mf_b_qO0o_E (Link to the story)