World I Knew" by Jordin Sparks and a behind-the-scenes extra called "Filmmaker Annotations." The movie download version includes the two bonus features from the DVD, plus three segments from the "Filmmaker Annotation" Blu-ray extra. Disneynature will also donate a portion of the home media proceeds earned through October 10, 2011 to the African Wildlife Foundation's "Save the Savanna" initiative. Music "The World I Knew" is a song performed by American recording artist Jordin Sparks, and serves as the theme song of African Cats. The song was written by Ryan Tedder and Inflo who also produced the song. It was released by Walt Disney Records as a digital download on the 12th of April, 2011, on iTunes and amazon.com. The film also features music by composer Nicholas Hooper; Hooper's soundtrack to the film was chosen as one of the 97 Original Scores eligible for a nomination at the 84th Academy Awards in 2011. Background Jordin describes the song as being about "everybody having a path they have to take but when you have that one person next to you or a few friends, if you have your family with you pretty much you can face another day, you can get through any obstacle and you can make it through anything." Music video The song's music video was shot in Burbank, California. The video places Jordin in a surreal world of sparkling butterflies and magic waterfalls, as she sings about eternal love. Viewers also get to see footage from the film, including scenes involving lion and cheetah cubs. The video premiered on Disney Channel on April 2, 2011 during The Suite Life Movie and played at the end credits of the film. Reception Box office The film earned $3.3 million on its opening day, which was just short of Earth'''s $4.1 million start and was the third-highest grossing opening day for a documentary film. However, Friday accounted for 55% of its opening weekend, as it set the record for the highest Friday percentage share for a movie, and grossed just over $6 million for its opening weekend, ranking in sixth place with a per-theater average of $4,921 from 1,220 theaters. The opening was the same as Disneynature's previous film, Oceans. The film's worldwide gross was $30,857,747. Critical response On the review aggregator website Rotten Tomatoes, 73% of 79 critics' reviews are positive, with an average rating of 6.30/10. The website's consensus reads,