The 85-year-old singer says his cancer has "gone at the moment", but calls for better screenings.
Sir Cliff Richard is performing at Birmingham Symphony Hall on Tuesday evening.
The 1973 film Take Me High will be toasted with a screening and new artworks created.
The Greenbelt Festival begins this week, 51 years after the first edition on a Suffolk farm.
Tickets for the UK dates of the 2025 Can't Stop Me Now tour are due to go on sale on Friday.
Sir Cliff donated a jacket to the hospice and said the facility's staff "provide amazing care".
Barbara began volunteering recently as a way to help alleviate her grief, after her husband's death 18 years ago.
Restaurant staff said the singer was "very down to earth" and was "such a kind soul".
The legendary singer treats BBC viewers to a melody and says he won't use AI in his work.
