Question: California Gurls was produced in part by a Swedish record producer rose to prominence in the second half of the 1990, after making hits for the Backstreet Boys, Britney Spears, and who?

<P0-S0> Karl Martin Sandberg (born 26 February 1971), better known as Max Martin, is a Swedish songwriter, record producer, and singer. <P0-S1>  He rose to prominence in the second half of the 1990s after making a string of major hits for artists such as the Backstreet Boys, Britney Spears, and NSYNC. <P0-S2>  Some of his earlier hits include "I Want It That Way" (1999), "...Baby One More Time" (1999), and "It's My Life" (2000). <SEP> <P1-S0> "California Gurls" is a song recorded by American singer Katy Perry. <P1-S1>  It served as the lead single for her third studio album, "Teenage Dream" (2010). <P1-S2>  The song features verses from rapper Snoop Dogg. <P1-S3>  Both artists co-wrote the song with Bonnie McKee and its co-producers Dr. Luke and Max Martin, with additional production from Benny Blanco. <P1-S4>  According to Perry, "California Gurls" is an answer song to "Empire State of Mind" (2009), by Jay-Z and Alicia Keys. <P1-S5>  Its midtempo production incorporates disco-pop, and funk-pop with influences of new wave, and electropop. <P1-S6>  Its lyrics are an ode to the state of California, in which both Perry and Snoop Dogg were born and raised. <SEP> <P2-S0> Christian Karlsson, also known by his stage name Bloodshy, is a Swedish record producer, DJ, and remixer known for his work with the musical groups Bloodshy and Avant, Miike Snow, INGRID, and Galantis. <P2-S1>  He started his international music career as one half of the electro pop duo Bloodshy & Avant with Pontus Winnberg, producing and co-writing tracks for pop stars such as Madonna, BoA, Kylie Minogue, and Katy Perry. <P2-S2>  Bloodshy & Avant notably co-wrote and produced Britney Spears' single "Toxic", which earned them a Grammy Award for Best Dance Recording in 2005. <P2-S3>  While continuing to work with Bloodshy and Avant, Karlsson also became a member of the indie pop band Miike Snow around 2007. " <P2-S4> Miike Snow", the group's debut album, was released in 2009, and peaked at number 11 on the Top Electronic Albums chart in the United States. <P2-S5>  Miike Snow won the 2011 European Border Breakers Award, and their second album "Happy to You" reached No. 1 on the Belgian Heatseekers Albums Chart and 43 on the "Billboard" 200. <SEP> <P3-S0> Backstreet Boys is the self-titled debut U.S. studio album by the vocal-pop group Backstreet Boys. <P3-S1>  The release of this album coincided with the release of their second international album "Backstreet's Back". <P3-S2>  Their international debut album released in 1996 was also titled "Backstreet Boys", but it was not released in the United States. <P3-S3>  This second self-titled album was released only in the United States in 1997, making it their debut album in the country. <P3-S4>  It became one of the most successful debut albums of all time. <P3-S5>  The album peaked at number four on the "Billboard" 200 albums chart and has been certified 14× Platinum (Diamond) by the RIAA for sales to retailers, having sold over 14 million copies to date in the United States. <P3-S6>  This was also reported as the second highest seller in the past 14 years for Music Club sales back in 2003, selling 1.72 million units.