8th Day 8th Day was an American R&B group from Detroit, Michigan. The Holland-Dozier-Holland songwriting team had scored hits in 1970 with the group 100 Proof (Aged in Soul); when their song "Somebody's Been Sleeping in My Bed" became a hit, radio stations also began playing the tune "She's Not Just Another Woman". HDH wanted to release the song as another single but didn't want to hurt the sales of "Somebody's Been Sleeping in My Bed", so they released "She's Not Just Another Woman" on Invictus Records under the name 8th Day in 1971.

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