Cindy Lee - Diamond Jubille → Cindy

https://en.wiktionary.org/wiki/Cindy#Etymology

In the 20th century adopted as a pet form of Cynthia.

https://en.wiktionary.org/wiki/Cynthia#Alternative_forms

(my bold)

Cinthia, Cinthya, Cintia, Cintya, Cynthea, Cyntheia, Cynthya, Sinthia, Sintia, Synthea, Synthia, Syntia

https://en.wikipedia.org/wiki/Cindy_(given_name)

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Also both are Canadian, and both songs were released in the 2020s.