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(FILES) This January 26, 2014 file photo shows Madonna as she arrives on the red carpet for the 56th Grammy Awards at the Staples Center in Los Angeles. Madonna on December 20, 2014 suddenly released six new songs months ahead of schedule, upset that early versions had been leaked online. The pop icon's new songs, available immediately for sale and streaming online, include the song "Living for Love" which she had planned to release for Valentine's Day. AFP PHOTO/ROBYN BECK Image Credit: AFP

In a surprise preview of her new album, Madonna released six songs on Saturday on iTunes and various streaming services.

The songs were released because several in-progress demos were leaked earlier this week, publicist Liz Rosenberg said.

Madonna said in a statement that she had wanted to wait until a different holiday season.

“I was hoping to release my new single Living For Love on Valentine’s Day with the rest of the album coming in the spring,” she said. “I would prefer my fans to hear completed versions of some of the songs instead of the incomplete tracks that are circulating. Please consider these six songs as an early Christmas gift.”

Songs available on Saturday also include the plaintive, anti-drug Devil Pray; the secretive, name-checking dance track Illuminati; and a duet with Nicki Minaj, B---h I’m Madonna. Additional music will be released on February 9, Rosenberg said.

The full album, Rebel Heart, is Madonna’s 13th and is set for release in March. Producers include Madonna, Diplo and Kanye West.