Question: One of New Zealand's top 50 singles in 2014 was which song by Eminem featuring Rihanna?
Context: The Glow in the Dark Tour is a critically acclaimed world concert tour by Kanye West featuring Rihanna, Lupe Fiasco, N.E.R.D, Santigold and Nas.  It began on April 16, 2008 in Seattle, Washington and travelled to Latin America, Asia, Europe, New Zealand and Australia through to early December.  The tour featured some surprise special guest artists, including Gnarls Barkley and Jay-Z.  Chris Brown also appeared at some shows to perform his remix of "Umbrella" with Rihanna, and as a dancer for N.E.R.D. For the New Zealand and Australian leg of the tour special guests Nas and New Zealand rapper Scribe replaced Lupe Fiasco and N.E.R.D, as N.E.R.D toured these countries separately.  Vanness Wu performed as the opening act on the Asian leg of the tour and performed "Good Life" with West during the show.  A same titled book authored by Kanye West with photography by Nabil Elderkin was published by Rizzoli USA in October 2009.  The tour grossed $30.8 million from 49 shows. This is a list of the Top 50 singles in 2007 in New Zealand, as listed by the Recording Industry Association of New Zealand (RIANZ). "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. This is a list of the Top 50 singles in 2009 in New Zealand, as listed by the Recording Industry Association of New Zealand (RIANZ). "Grass" is the first single from Animal Collective's 2005 album, "Feels".  Pitchfork Media listed the song at #31 on its list of Top 50 Singles of 2005, claiming it is "as infectious as anything on the pop charts this year, and lots more fun to scream along with".  The song was subsequently placed at #73 in the same publication's list of "Top 500 Tracks of the 2000s".  Stylus also placed it in its Top 50 Singles of 2005 (this time at #44), praising the band's ability to "play tug of war between typical pop dynamics and the skewed perspective of experimental music".  The title track was included in the 2008 book "The Pitchfork 500". For Those Who Think Young, appearing on the album cover as (for those who think young) and originally to be entitled for those who think jung, was the third album by Canadian new wave band Rough Trade; it was released in 1981 (True North TN-48 in Canada; Boardwalk NB-33261-1, US; Big Time, UK; CBS 85385, The Netherlands).  It climbed to #9 in Canada on the "RPM" Top 50 Albums Chart on November 7, 1981 (putting it at #1 on the CANCON Chart listing), and held the position for three weeks, dropping out of the Top 50 after sixteen weeks on February 6 of the following year.  It was certified gold in Canada by the CRIA on November 1, 1981.  The single "All Touch" gave the band its biggest commercial success, reaching #12 in Canada on the "RPM" Top 50 Singles Chart (#2 on the CANCON Chart) and #58 on the U.S. ""Billboard" Hot 100". Pop Mechanix was a New Zealand pop music band that played in New Zealand and Australia from 1979 to 1988.  Their hit single, "Jumping out a Window", reached number 87 of the all-time top 100 singles for APRA NZ, and number 12 in the all-time top 50 singles for The Press This is a list of the top-selling singles in New Zealand for 2014 from the Official New Zealand Music Chart's end-of-year chart, compiled by Recorded Music NZ.  English singer-songwriter Ed Sheeran had the most songs in the top 50, with four.  The chart also includes three songs by New Zealand artists: "Freaks" by Australian DJ Timmy Trumpet and New Zealand rapper Savage, and "Holding You" by Ginny Blackmore and Stan Walker, and "Bridges" by Broods.  Four songs also featured in the New Zealand top 50 singles of 2013: Katy Perry's songs "Roar" and "Dark Horse", "I See Fire" by Ed Sheeran, "The Monster" by Eminem and "Timber" by Pitbull.  The 2014 chart was the first to include online streaming as well as sales data. This is a list of the Top 50 singles in 2008 in New Zealand, as listed by the Recording Industry Association of New Zealand (RIANZ). "Crack a Bottle" is a song by American rapper Eminem, featuring American rappers Dr. Dre and 50 Cent.  The song was released as the lead single from Eminem's album "Relapse" (2009).  On February 12, 2009, the song broke the first week digital sales record with 418,000 downloads, topping the previous record held by "Live Your Life" by T.I. featuring Rihanna.  This record was broken again the following week by "Right Round" by Flo Rida.  The song won the Grammy Award for Best Rap Performance by a Duo or Group in 2010.
Answer: The Monster