Which celebrities do you know have “fake” or changing accents/voices?

From the top of my head, I know Ariana Grande has been accused of changing her voice a lot (her original tone is deep, but she went through an AAVE phase early in her career, and now seems to have adopted a high-pitched sing-song type of voice).

Paris Hilton recently revealed that she faked her high-pitched voice during her Sweet Life show.

Michael Jackson also switched back & forth from a high voice to a deeper voice.

Hilaria Baldwin and Madonna faked having accents for a time too. Who else?