What a Difference a Day Made: Doris Day Superstar
- Curs: 2009
- País: Germany
- Gènere: Documentary
- Estudi: Florianfilm, ARTE
- Paraula clau: biography
- Director: Andrew Davies, André Schäfer
- Repartiment: Doris Day, Peter Graves, Philip Brown, Kitten Kay Sera, Jackie Joseph, Noah Keen