Question: "The Monster" is a song by American rapper Eminem, featuring guest vocals from Barbadian singer Rihanna, taken from Eminem's album "The Marshall Mathers LP 2" (2013), it marks the fourth collaboration between Eminem and Rihanna, following "Love the Way You Lie", its sequel "Love the Way You Lie (Part II)" (2010), and which song by Barbadian singer Rihanna from her seventh studio album "Unapologetic" (2012)?
Context: 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" 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. "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)". "Bitch Please II" is a song by American rapper Eminem, featuring guest vocals from American rappers Dr. Dre, Snoop Dogg, Xzibit, and Nate Dogg, taken from Eminem's "The Marshall Mathers LP" (2000).  The song was written by Eminem, Dr. Dre, Snoop Dogg, Xzibit and Nate Dogg with, production handled by Dr. Dre and Mel-Man. "Bad Guy" is a song by American hip hop recording artist Eminem, taken from his eighth album "The Marshall Mathers LP 2" (2013).  The song connects the second "Marshall Mathers LP" to the first, which was released in the year 2000.  "Bad Guy" is also a sequel to Eminem's hit single "Stan", which appears on the aforementioned album. "The Monster" is a song by American rapper Eminem, featuring guest vocals from Barbadian singer Rihanna, taken from Eminem's album "The Marshall Mathers LP 2" (2013).  The song was written by Eminem, Jon Bellion, and Bebe Rexha, with production handled by Frequency.  "The Monster" marks the fourth collaboration between Eminem and Rihanna, following "Love the Way You Lie", its sequel "Love the Way You Lie (Part II)" (2010), and "Numb" (2012).  "The Monster" was released on October 29, 2013, as the fourth single from the album.  The song's lyrics present Rihanna coming to grips with her inner demons, while Eminem ponders the negative effects of his fame. The Marshall Mathers LP 2 is the eighth studio album by American rapper Eminem.  Aftermath Entertainment, Shady Records, and Interscope Records released the album on November 5, 2013.  It serves as a sequel to "The Marshall Mathers LP" (2000).  The album's production and its recording sessions were conducted from 2012 to 2013, involving Eminem himself, along with several record producers including Rick Rubin, Luis Resto, Emile Haynie, and Alex da Kid.  "The Marshall Mathers LP 2" features guest appearances from singers Skylar Grey, Rihanna, Nate Ruess, and rapper Kendrick Lamar. Slim Shady EP is the 1997 debut extended play by American rapper Eminem, through the Detroit-based record label Web Entertainment.  Unlike "Infinite", "Slim Shady EP" helped Eminem gain the interest of CEO Jimmy Iovine (co-founder of Interscope Records) and West Coast hip-hop producer Dr. Dre, who subsequently signed Eminem to his Aftermath Entertainment record label, and served as executive producer on his major-label debut album "The Slim Shady LP" (1999).  Dre also served as executive producer on Eminem's later albums such as "The Marshall Mathers LP" (2000), "The Eminem Show" (2002), "Encore" (2004), "" (2005), "Relapse"-"Refill" (2009), "Recovery" (2010), and "The Marshall Mathers LP 2" (2013). "Kim" is a song by American rapper Eminem which appears on his 2000 album "The Marshall Mathers LP".  The song reflects intense anger and hatred toward Eminem's then-wife Kim Mathers and features Eminem imitating her voice, and ends with Eminem killing Kim and later burying her.  "Kim" was the first song the rapper recorded for the album, shortly after finishing work on "The Slim Shady LP" in late 1998.  Eminem wrote this song, along with "'97 Bonnie & Clyde" (where Eminem and his daughter go to the lake to dispose of Kim's dead body), at a time when he and Kim were having marital problems and Kim was preventing him from seeing his daughter Hailie.  While the song has been cited as an example of misogyny in hip hop culture, it is often highlighted as one of Eminem's most memorable songs. "Numb" is a song by Barbadian singer Rihanna from her seventh studio album "Unapologetic" (2012).  It features guest vocals by American rapper Eminem, making it the pair's third collaboration since the two official versions of "Love the Way You Lie".  Following the album's release, "Numb" charted on multiple charts worldwide including in Canada, the United Kingdom and the United States.
Answer: Numb