"Airplanes" is a song by American rapper B.o.B, featuring vocals from Hayley Williams, lead singer of American rock band Paramore.
 The song was released in April 2010, as the third single from his debut studio album, "".
 B.o.B co-wrote the song alongside Kinetics & One Love, Alex da Kid, DJ Frank E, and Christine Dominguez.
 DJ Frank E also co-produced the song with Alex da Kid.
 The song was released to iTunes on April 13, 2010 and then to urban radio on April 27, 2010.
"Demons" is a song by American rock band Imagine Dragons.
 It was written by Imagine Dragons and Alex da Kid, and produced by Alex da Kid.
 The song appears on their major-label debut extended play "Continued Silence" and also makes an appearance on their debut studio album "Night Visions" as the fourth track.
 "Demons" was solicited to American triple-A radio stations on January 28, 2013 and to modern rock stations on April 1 and serves as the album's overall fifth single and was released as the third single from "Night Visions" in the United States, and was later released to contemporary hit radio stations on 17 September 2013 as an official single.
 The lyrics portray the protagonist warning the significant other of his or her flaws.
"Lotus Intro" is a song recorded by American singer Christina Aguilera for her seventh studio album, "Lotus" (2012).
 Written by Aguilera, Dwayne Abernathy, Candice Pillay and Alex da Kid, the song is about her rebirth as an artist, and is a representation of the symbolic nature of the Lotus Flower.
 "Lotus Intro" was created from Aguilera's passion for "chill-out" electronica music, and incorporates electronic and electronica styles.
 A sample of M83's "Midnight City" was originally included in the demo, but was ultimately not cleared.
Alexander Grant (born 27 August 1982), professionally known as Alex da Kid, is a British music producer from Wood Green, London.
 He has gained recognition for producing several hit singles for a plethora of artists in various music genres, such as Dr. Dre ("I Need a Doctor"), Nicki Minaj ("Massive Attack"), B.o.B ("Airplanes" featuring Hayley Williams), Eminem ("Love the Way You Lie" featuring Rihanna), Diddy ("Coming Home" with Dirty Money featuring Skylar Grey), Imagine Dragons ("Radioactive") and Cheryl ("Under The Sun").
Holly Brook Hafermann (born February 23, 1986), who goes by the stage name Skylar Grey, is an American singer and songwriter from Mazomanie, Wisconsin.
 In 2004, under the pseudonym Holly Brook, at the age of 17, she signed a publishing deal with Universal Music Publishing Group and a recording contract with Linkin Park’s Machine Shop Recordings imprint.
 In 2006, she also released her debut album, "Like Blood Like Honey", under the aforementioned labels.
The discography of Skylar Grey (formerly Holly Brook), an American singer-songwriter consists of three studio albums, five extended plays (EPs), 21 singles (including nine as a featured artist) and 14 music videos. Grey was signed to Machine Shop Recordings under the name Holly Brook.
 She released her debut album "Like Blood Like Honey" in 2006, but was released from her contract after it did not perform commercially.
 She began working under the name Skylar Grey in 2010, co-writing the three versions of "Love the Way You Lie" with Alex da Kid, who signed her to his Wonderland Music (now KIDinaKORNER) label.
"American Oxygen" is a song recorded by Barbadian singer Rihanna.
 It was written by Alex da Kid, Candice Pillay, Sam Harris and Rihanna; Alex da Kid and Kanye West produced it.
 Written over the course of a year, "American Oxygen" was inspired by the 1984 single "Born in the U.S.A." performed by Bruce Springsteen.
 It was made available for streaming on Tidal on April 5, 2015, and released for digital download on April 14 via the iTunes Store.
 The song has patriotic lyrical content about a new America and the chasing of the American dream.
"Love the Way You Lie" is a song recorded by the American rapper Eminem, featuring the Barbadian singer Rihanna, from Eminem's seventh studio album "Recovery" (2010).
 The singer and songwriter Skylar Grey wrote and recorded a demo of the song alongside the producer Alex da Kid when she felt she was in an abusive romantic relationship with the music industry.
 Eminem wrote the verses and chose Rihanna to sing the chorus, resulting in a collaboration influenced by their past experiences in difficult relationships.
 Recording sessions were held in Ferndale, Michigan, and Dublin, Ireland.
 Backed by guitar, piano and violin, the track is a midtempo hip hop ballad with a pop refrain, sung by Rihanna, and describes two lovers who refuse to separate despite being in a dangerous love–hate relationship.
Loud is the fifth studio album by Barbadian singer Rihanna.
 It was released on November 12, 2010, by Def Jam Recordings and SRP Records.
 It was recorded between February and August 2010, during the singer's Last Girl on Earth Tour and the filming of her first feature film "Battleship".
 Rihanna was the executive producer of "Loud" and worked with various record producers, including StarGate, Sandy Vee, The Runners, Tricky Stewart and Alex da Kid.
 The album features several guest vocalists, including rappers Drake, Nicki Minaj and Eminem, who is featured on the sequel to "Love the Way You Lie", titled "Love the Way You Lie (Part II)".
"Love the Way You Lie (Part II)" is a song by Barbadian singer Rihanna from her fifth studio album "Loud" (2010).
 It features guest vocals from American rapper Eminem, who wrote the song alongside Skylar Grey and the producer Alex da Kid.
 It is the sequel to the 2010 hit single "Love the Way You Lie", which appears on Eminem's seventh studio album "Recovery".
 It received positive reviews from critics and was performed for at the American Music Awards of 2010 on November 21, 2010, as part of a medley with "What's My Name?
" and "Only Girl (In the World)".

Question: Where is the singer and songwriter who recorded a demo of "Love the Way You Lie" alongside Alex da Kid from?
Answer: Mazomanie, Wisconsin