Knights longtime publicist confirmed her death with multiple media outlets.

The song reached No.

2 on Billboards Hot 100 chart and No.

Jean Knight

Jean KnightMichael Ochs Archives/Getty Images

1 on R&B chart.

The record stayed on both charts for 16 weeks.

Mr. Big Stuff went double platinum, selling over two million records.

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Knight was nominated for a Grammy for the single.

All I have to do is sit at home and wait for the mailman.

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In 1972, Knight hit the R&B charts again with Carry On.

Her last recording for Stax, the song was considered a regional success.

Before recording for Stax, Knight also recorded for the Houston-based Jet Stream label.

Jet Stream also had Barbara Lynn and Bobby Patterson & the Mustangs were also on the label.