Question: Who directed secretprojectrevolution with the American singer and songwriter born in 1958?

Context paragraphs:
Cofield Mundi: Cofield Mundi is a South African singer and songwriter born in Johannesburg, South Africa.  Raised in a musical family, she began singing and performing from a young age and wrote her first song at the age of 12.  Her aunt is South African born actress and singer Jill Kirkland, famous for her role in the movie "Katrina".

Judith Hill: Judith Glory Hill (born May 6, 1984) is an American singer and songwriter born in Los Angeles, California.  She has provided backing vocals for such artists as Michael Jackson, Stevie Wonder and Josh Groban.  In 2009, Hill was chosen as Jackson's duet partner for the song "I Just Can't Stop Loving You" during his "This Is It" concert tour.  After Jackson's death in 2009, she, along with the rest of the "This Is It" cast members, performed at Jackson's memorial service and attracted global attention when she sang the lead on the song "Heal the World".  Hill's rise to fame is briefly recounted in "20 Feet from Stardom", a documentary film that tells the untold story of the backup singers behind some of the "greatest musical legends of the 21st century".  She is also a featured artist on the film's soundtrack.  She won the Grammy Award for Best Music Film for her performance in this film.

Secretprojectrevolution: secretprojectrevolution is a 2013 American short film directed by Madonna and Steven Klein, dealing with artistic freedom and human rights.  The film launched a global initiative Art for Freedom to further freedom of expression, created by Madonna, curated by "Vice" and distributed by BitTorrent.  The goal of Art for Freedom is to promote and facilitate free expression, and thereby hamper repression of artistic expression.

Francisco Céspedes: Francisco Fabián Céspedes Rodríguez, also known as Pancho Céspedes, is a Grammy-nominated Latin American singer, musician, and songwriter born in Santa Clara, Cuba.  Céspedes is currently a naturalized Mexican.  He is most known for his 1998 song, "Vida Loca".

Julia Easterlin: Julia Easterlin, now professionally known as Hite, is an American singer/songwriter born in Georgia.  Her earlier music uses a looping machine which allows her to layer several recordings of her own voice, an effect which The Boston Globe described as a "One-woman a capella group."  She perfected this technique at the Berklee College of Music in Boston, and later played in Berklee's CMJ Music Marathon showcase in New York City.  She continues to grow in popularity, most notably playing at Lollapalooza and SXSW.

Louise Massey: Louise Massey (born Victoria Louise Massey: 10 August 1902 – 20 June 1983 in San Angelo, Texas), American singer and songwriter born in Midland, Texas.  The Massey family left Texas while Louise Massey was very young and she grew up near Roswell in Lincoln County, New Mexico.  In 1918, Louise's father, Henry Massey, started a band that featured himself and three of his eight children singing and playing musical instruments.  Most of the children played were able to play several instruments while dressed in “elaborate cowboy outfits as their stage attire,” Louise played piano and sang.  The Massey’s music career began in 1920s, when they played and sang at local shows and church socials.  At the age of 15, Louise married Milton Mabie, who also joined the group.

Mia Sable: Mia Sable is an actress, voice over artist and award winning American singer/songwriter born and raised in Charlotte, North Carolina and currently residing in Los Angeles, California.  Sable has opened for well-known artists like Meiko and Sara Bareilles.

Madonna (entertainer): Madonna Louise Ciccone ( ; born August 16, 1958) is an American singer, songwriter, actress, and businesswoman.  A leading presence during the emergence of MTV in the 1980s, Madonna is known for pushing the boundaries of lyrical content in mainstream popular music, as well as visual imagery in music videos and on stage.  She has also frequently reinvented both her music and image while maintaining autonomy within the recording industry.  Besides sparking controversy, her works have been acclaimed by music critics.  Referred to as the "Queen of Pop", Madonna is widely cited as an influence by other artists.

Nathan Pacheco: Nathan Pacheco (born 1980) is an American singer/songwriter born in Virginia, and is of Brazilian descent.  He was a featured vocalist during the 2009 tour for "Yanni Voices", produced by Walt Disney Records and is currently signed to the Disney Pearl Series sub-label.

Teron Beal: Teron Beal is an American singer/songwriter born in Tyler, Texas.  He has also written songs for Michael Jackson, Jennifer Lopez, P!nk, Kelly Rowland, Mýa, Chrisette Michele, Robyn, Jaheim and others.

Supporting paragraphs: Secretprojectrevolution Madonna (entertainer)
Answer: Steven Klein