The score for Apple TV+sBad Sistersfeatures a collaboration betweenTim PhillipsandP.J.

We cut the title track as well.

Its 99% that take.

WGA West building in Hollywood

Phillips also helped Harvey harmonize with herself.

The show is about four sisters who plot against the fifths husband.

Polly [the P.J.

Theres five of her singing in that.

One is pitch shifted down.

Throughout the score of the episodes, Harvey employs a Bulgarian style of singing.

Sharon Horgan, who adaptedBad Sisters for Apple, suggested the Bulgarian female vocals.

Thats very expressive and uses a lot of cackles and whoops, Phillips said.

It just so happened that Polly Harvey had recently been studying this form of singing.

It was the biggest, wildest fluke whatsoever.

We went and got her doing all that stuff.

It just really seemed to work within the tone of the show.

Check out the panel video above.