Ella Fitzgerald to How Can I Be Sure of You in 7 Steps

1. Ella Fitzgerald recorded Open Your Window
2. Open Your Window was arranged by George Tipton
3. George Tipton arranged Angie's Suite
4. Angie's Suite was published by Unichappell Music
5. Unichappell Music published Poli High
6. Poli High was produced by Harry Nilsson
7. Harry Nilsson sang How Can I Be Sure of You

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