(Photo: CanvaPro)

Whether it's the gripping, evocative scoring on a slasher horror-suspense film, or a riveting melody to add to the tear-jerking effect of a dramatic motion picture, there is no denying that the soundtrack of a movie significantly contributes to how much dough it will earn. The theme song is also an indicator of how it will rank among the list of box office hits.

Music, as defined by the ASCAP Foundation, is an essential element of the filmmaking process. Embedded in the favorite movies of all time are some chart-topping hits. Here are seven of the most popular OST's from 1990 - 2010 which ruled the Billboard Hot 100 charts for several weeks at No. 1.

"My Heart Will Go On" by Celine Dion

The Canadian diva's trademark song came from the soundtrack of "Titanic." The stirring ballad debuted at No. 1 on the Hot 100 charts on Feb. 7, 1998, and lingered on for ten weeks at the top. It garnered numerous awards under its belt including the 1998 Academy Award for The Best Original Song, and in the 1999 Grammy Awards, it swept the Song of the Year, Record of the Year, Best Female Pop Vocal Performance, and the Best Song Written Specifically for a Motion Picture or Television.

"I Will Always Love You" by Whitney Houston

This Whitney Houston classic broke a lot of world records after staying in the Billboard Hot 100 for 29 weeks, 14 weeks of which were at the number 1 spot. It peaked on Nov. 28, 1992. The song was originally written and recorded by Dolly Parton but peaked in popularity as the theme song of "The Bodyguard". It holds the record as one of the best-selling singles of all time.

"(Everything I Do) I Do It For You" by Bryan Adams

The film "Robin Hood: Prince of Thieves" was a huge success with theater ticket sales, while the Canadian rocker's power ballad zoomed on the Hot 100 charts. It peaked at the top on July 27, 1991, and stayed on for seven weeks at No. 1.

"End Of The Road" by Boyz II Men

The theme song of the Eddie Murphy romantic comedy film "Boomerang" hit No. 1 on August 15, 1992, and dominated the chart for a long 13 weeks.

"Lose Yourself" by Eminem

This multi-awarded track from the movie "8 Mile" which starred the rapper, spent three months at the top of the charts with its peak date on Nov. 9, 2002. Critics have placed this record on the pedestal as Eminem's greatest work which earned him his first Oscar award and two Grammys.

"It Must Have Been Love" by Roxette

The pop ballad, released in 1987, came from the soundtrack of one of the most-loved romantic movies of all time, "Pretty Woman" starring Julia Roberts and Richard Gere. It peaked at No. 1 on June 16, 1990, and spent two weeks at the top spot of the Billboard Hot 100.

"Independent Women Part I" by Destiny's Child

Three strong women of Destiny's Child sang for three powerful ladies in the remake of "Charlie's Angels." The chemistry was too strong that when it landed on No. 1 at Hot 100 charts on Nov. 18, 2000, it did not leave the spot for 11 weeks.