"Free" is a song by English recording artist Natalia Kills from her debut studio album, Perfectionist. Written by Kills, Jeff Bhasker, Kid Cudi and No I.D., produced by Bhasker. Lyrically, the song discusses materialism, consumerism, and obsessions with glamour and wealth. It was released digitally in Europe and the US as the album's third single in June 2011. The song was released as the second single in the UK on 11 September 2011.Two videos concepts are similar to breakfast at Tiffany's,1961 film

For the single version, will.i.am provided an opening verse and bridge. The single version was the official version on the US release of the album, the UK track listing to be announced. "Free" was released as Kills' second single in the United Kingdom on 11 September 2011, as an iTunes EP featuring both versions with and without will.i.am including 2 remixes, and a new magazine-style artwork. Polydor Records, who represent Kills in the UK, decided against releasing Wonderland as a single in th UK and have instead chosen to promote the album Perfectionist by releasing "Free" a week before the album's release. "Free" is based around a riff sample taken from Kate Bush's "Wuthering Heights".

Produced by Jeff Bhasker and co-penned by Kills, Kid Cudi and No I.D., described the song as one of the most fun, breezy songs off of Kills’ debut album. "Free" is a dance-pop and synthpop song with urban club beats with a Euro-friendly synths and impressive guest feature by Will.i.am, Digital Spy added saying: "it certainly ticks many a box on the modern pop song checklist. " Muumuse said the song contains the objectively perfect pop line: “I can look fresh in a potato sack.”

"Free performed better than Kills previous single "Wonderland". In Austria the song reached a peak at number 4, becoming Kills highest charting single there, it remained it the charts for 17 weeks. The song peaked at number 96 in The Netherlands, and stayed in the charts for 2 weeks. In Germany the song reached number 15 on the charts.

The music video for the song was released on YouTube on 6 July 2011. The music video starts with a date, 15 August 2011 (Natalia's birthday) and the word "REC", after it, the song title, "Free". Natalia appears above a television, that transmits an image of will.i.am, while a camera is filming her. The words and phrases "You Can Buy Happiness", "Free", "Perfectionist", "Money Is Everything", "Buy Your Freedom", "You Are What You Wear", "You Are Free", appear throughout the video. A woman appears smoking, a man putting lipstick (AJ English- Model), a naked person removing ripping their clothes with a heel, Kills above motocycles and her in a box filled with dollars. Some montages show Kills with a muscular body, a woman with long neck, and with her hair on fire. Kills is also seen surrounded by a woman wearing a suit, with her breasts exposed, the lipstick man, and a couple other people. Another man with long hair, wearing a hat and veil, strips off his clothes. In the last scene of the video, the box is completely filled with dollars, and just after the last word of the song, i.e. "I'm" is sung, we only see Kills' hand with the word "free" written on it.

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