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Music supervisor Susan Jacobs has had a pretty successful year.

In February, she helped director Jean-Marc Vallee put together the breakout soundtrack for HBOsBig Little Lies.

They had a lot of problems because its about Tonya Harding, Jacobs says.

I understood that clearly.

A lot of artists said no thank you.

That was their biggest problem.

That was my motto.

Ahead, Jacobs explains the decisions behind six of the movies key tracks.

The song worked because it gave this energy to the first time we see her as an adult.

It was trying to come in there with a lot of punch and power.

Way before Craig started shooting this movie, his wife had given him Romeo And Juliet from Dire Straits.

The lyrics, for her, felt like the story.

Unfortunately, Dire Straits founder Mark Knopfler initially wasnt willing to license the song for use.

And Mark Knopfler had said absolutely not.

That was when I came in.

And he did, and he loved it.

That was the oxygen that let me know I had the right approach.

For Jacobs, the yes from Knopfler was a key to landing the rest of the films soundtrack.

Romeo And Juliet was the thing that helped add fuel to realizing this is going to work.

A lot of artists just dont.

Thats why she struggled so much.

She liked all these songs.

So much in this movie is accurate.

Thats whats so crazy.

The mother [Allison Janney] really did sit there with a parrot!

… That was an emotional thing for us because it worked really well in the film.

But we didnt really even get to get there.

We had a cool version but when I saw Ariana Grande singing that I was like, Forget it.

And yet I love Dream a Little Dream and it has a deeper meaning in a way.

Doris Day just felt like a really good contrast to the rest of the soundtrack.

Viewers meet the two characters as Laura Branigans disco track blares on the soundtrack.

Gloria, how perfect is that!

Craig originally shot that because the character is singing to it but how perfect is that song?

Because its not accurate.

Wed really be more in the late 80s and 90s.

In general, all of this stuff is fun but with a genuine heart and warmth.

you should probably understand her.

Gloria [released in 1982] is fun but it has a warmth to it.

Thats why were in this time period, even though its not particularly accurate.

The whole ending was tonally really hard.

Everyone worked really hard trying to figure out what the end of this movie was going to be.

The Passenger was just something obviously female and the lyrics [resonated].

You dont want to say too much and you dont want to say too little.

It just felt tonally so right for the ending.