Question: Who once led a campaign for the musical artist who once toured with Sufjan Steven's?

Context paragraphs:
Lety López: Leticia Jannet López Ramos, known professionally as Lety López (and formerly Leticia López), is an award-winning Mexican theater actor, musical artist and voice actor.  She was awarded with the Bravo, APT and ACPT awards for Best New Female Actress in a Musical in 2012 for her work in "Si Nos Dejan - El Gran Musical Mexicano".  She was named "La Reina del Mariachi", or Queen of Mariachi, by multiple Grammy Award-winning mariachi artist Pepe Aguilar following a competition; López opened for Aguilar during his 2014 concert dates and was awarded with a recording deal from Aguilar's record company.

St. Vincent (musician): Anne Erin "Annie" Clark (born September 28, 1982), better known by her stage name St. Vincent, is an American musician, singer-songwriter, and multi-instrumentalist.  After studying at Berklee College of Music for three years, she began her music career as a member of the Polyphonic Spree.  Clark was also a member of Sufjan Stevens's touring band before forming her own band in 2006.

D. S. Bradford: D. S. Bradford (born David Scott Bradford, December 10, 1982) is an American musical artist, singer-songwriter, performer, vocalist, guitarist, and composer from Philadelphia, Pennsylvania.  In addition to being a musical performer, Bradford is a visual artist whose works are mostly considered to be surrealism.  An example of which is his album art for "Oceans," his debut single (released July 1, 2014).

Sentimiento (album): Sentimiento (English: "Feeling") is the sixth studio album by Puerto Rican recording artist Ivy Queen.  It was released on March 27, 2007 by Univision Records.  The album features production collaborations with several Puerto Rican music producers including Monserrate & DJ Urba, Noriega, and Luny Tunes.  It also features vocal collaborations with Don Omar, Arcángel, Tito "El Bambino", Ken-Y, Randy and Naldo.  The album includes solo performances by Baby Rasta, Divino, Mikey Perfecto, Naldo and Noriega.  Musically, the album alternates between reggaetón, bolero, and salsa.  The move in musical composition from reggaetón and hip hop is credited to Queen's evolution as a musical artist.

Thai Elephant Orchestra: The Thai Elephant Orchestra is a musical ensemble consisting of as many as fourteen Thai elephants near Lampang in Northern Thailand.  The elephants play music, essentially as conducted improvisations, on specially designed heavy-duty musical instruments.  The orchestra was co-created by elephant conservationist Richard Lair of the National Elephant Institute and the American musical artist and neuroscientist Dave Soldier.  They have released three CDs on the Mulatta Records label with an orchestra ranging in size from six to fourteen elephants.  The orchestra currently performs for visitors at the center.

Celinde Schoenmaker: Celinde Schoenmaker (born 15 January 1989) is a Dutch musical artist .  She studied Music at the Fontys Academy of Arts in Tilburg; she graduated this training in 2012 with summa cum laude honors.  At that time she had already been cast for the female lead in the Dutch version of Ghost the Musical , but this production was postponed indefinitely and never came to pass.  Since then, she has appeared as Fantine in the West End production of the musical Les Misérables and as Jenny Cavalleri in the Dutch touring production of Love Story.  From 7 September 2015 she has been playing in the West End production of The Phantom of the Opera in the role of Christine Daaè.

Nabil Ayers: Nabil Ayers is an American entrepreneur and musician.  He is the U.S. Label Manager for UK-based record label 4AD where he has led album campaigns for The National, Grimes, St. Vincent, Purity Ring, Deerhunter, tUnE-yArDs, Future Islands and others.  Ayers co-founded Seattle’s Sonic Boom Records store with his business partner, Jason Hughes, and founded the independent record label The Control Group.  As a drummer, he has performed with various acts, most recently The Long Winters and Tommy Stinson.

Dawn Landes: Dawn Landes is an American singer-songwriter and musician.  She is originally from around Louisville, Kentucky but spent many years living and performing in Brooklyn, New York.  As a recording artist she has released four full-length albums: "dawn's music" (2005), "Fireproof" (2008), "Sweetheart Rodeo" (2010), and "Bluebird" (2014) and five EPs: "Straight Lines" (2006), "Two Three Four" (2006), "Mal Habillée" (2012), "Covers EP" (2014) and "Desert Songs" (2015).  In support of her releases, Landes has toured extensively in the US, Europe and around the world, often sharing the stage with artists such as Ray Lamontagne, Feist, Andrew Bird, José González, The Weakerthans, Midlake, Suzanne Vega, and Sufjan Stevens.

Mike Del Rio: Michael Francis Gonzalez (born March 8, 1988), also known by his stage name Mike Del Rio, is a musical artist, producer, and songwriter from New York, NY now based in Los Angeles, CA.  He is the co creator and lead member of the alternative group POWERS along with songwriter, vocalist and instrumentalist Crista Ru signed to Republic Records.  As a record producer, Del Rio's eclectic style and musicality has led him to work with an array of artist such as Kylie Minogue, Selena Gomez, Eminem, Christina Aguilera, Cee Lo Green, Cheryl Cole, The Knocks, Skylar Grey, Jamie N Commons, and X Ambassadors.  Most recently Del Rio executive produced recording artist LP latest album "Lost on You" containing the global hit title track "Lost on You".  He is signed to Alex Da Kid's publishing company KidinaKorner distributed through Universal Music Group.

Wendy Rule: Wendy Elizabeth Rule (born 1966) is an Australian musical artist.  She was born in Sydney, later moved to Melbourne.  She performs regularly, and has toured the United States and Europe.  Rule has been based in Santa Fe, New Mexico.

Supporting paragraphs: Nabil Ayers St. Vincent (musician)
Answer: Nabil Ayers