Ever wonder what song was playing when Christian Grey first touched Anastasia Steele in "Fifty Shades of Grey?"

The steamy "Fifty Shades" trilogy, written by bestselling author E.L. James, tells the story of 22-year-old recent college grad Anastasia Steele, who enters into a dominant/submissive sexual relationship with 27-year old sexy billionaire Christian Grey, through an "agreement," and both explore the world of BDSM (bondage, dominance, submission, masochism).

Many fans might already know picture in their heads what might play when the two key roles of Anastasia and Christian mingle.

James already has curated some of her favorite songs that are inspired for the books.

The Huffington Post highlighted the "Fifty Shades" soundtrack that appears on her website.

"It pretty much includes every song that you think it should," reported the Huffington Post.

"From Britney Spears "Toxic" (which James writes would play as Christian and Anastasia "drive to chase the dawn") to Bruce Springsteen's 'I'm On Fire' (which Anastasia blasts on her drive back to Washington State University) and Kings of Leon's 'Sex of Fire' (do we really need to explain this one?) James' soundtrack is every bit as gratifying as Christian Grey himself."

Beyonce's single "Crazy in Love" is listed on the "Fifty Shades Darker" "soundtrack."

Readers of the erotic novel already know which stars they want to play Anastasia and Christian.

"Game of Thrones" star Emilia Clarke, "Gilmore Girls" star Alexis Bledel, "Percy Jackson & the Olympians" star Alexandra Daddario, "The Vampire Diaries" star Ian Somerhalder, "DietTribe" Jessie Pavelka, "White Collar" star Matt Bomer are just some of the popular actors/actresses that have been linked to the two steamy roles.

Actress Angelina Jolie has recently been linked to the role of Anastasia.

The 37-year-old actress was introduced to the steamy novel while shooting her new film, "Maleficent," in the United Kingdom.

A source told the Daily Mirror newspaper, ''Angelina kept hearing about the book while she was in the UK. All the girls on set were talking about it and how it's being made into a film.

''Angelina went out and bought herself a copy, thinking she'd love a part in the hot topic on everyone's lips at the moment. She knows the film is bound to be a huge hit.''

The National Ledger said that Jolie is famed for dressing in bondage-style clothing in the past and famously wore the blood of her ex, Billy Bob Thornton, in a vial around her neck.

The insider continued, ''Ange is dead-set on a major part. She's up for the challenge.''

Click HERE to see who the front-runners are this week for the two crucial roles of Anastasia Steele and Christian Grey.