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In 2018 a global superstar walked onto The Voice Australia stage as a "secret" singer.

The coaches had no idea they were hearing Jess Glynne sing her own number one hit.

Watch the exact second it clicked.

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In 2018 a global superstar walked onto The Voice Australia stage as a "secret" singer.

The coaches had no idea they were hearing Jess Glynne sing her own number one hit.

Watch the exact second it clicked.