Question

How does the oxymoron "rehearsed spontaneity" affect the meaning of this sentence? The pop singer shook hands and signed autographs, her smiling, rehearsed spontaneity winning her even more fans

Answer 1

The oxymoron casts doubt upon the sincerity of the pop singer.
I hope this helps

Answer 2

An oxymoron is a figure of speech in which two terms with opposing meanings (they contradict each other) are used together. This figure is often used for dramatic effect, to attract the reader's attention and make them think or laugh. In the provided passage, the oxymoron "rehearsed spontaneity" has as purpose to make the reader think of the meaning of the phrase and the situation; and it affects the meaning of the sentence by casting doubt upon the sincerity of the pop singer: Does she enjoy to be with her fans and to sign autographs? Is she being real there? Is it she being spontaneous? Or the apparent spontaneity is false?