Question: What is the name of this song recorded by Barbadian singer Rihanna for her album "Unapologetic", in which she worked with Anthony Mandler on the music video?

"What Now" is a song recorded by Barbadian singer Rihanna for her seventh studio album, "Unapologetic" (2012).  It was written by Olivia Waithe, Parker Ighile and Nathan Cassells alongside Rihanna, with production handled by Ighile and Cassells.  A remix collection was released exclusively to Beatport on August 29, 2013 and later via iTunes, Amazon, and Google Play on September 17, 2013.  The single was serviced to US rhythmic radio on September 24, 2013, before impacting mainstream radio on October 1, 2013 as the fifth international single and sixth overall from "Unapologetic".  Another remix collection was released to Beatport on October 29, 2013.  The song is a mid-tempo piano ballad which incorporates sounds which resemble "sonic bombs" during the chorus and "crashing" drums. <SEP>  It was written by Sia Furler together with its producers, Benny Blanco and StarGate.  The song premiered on September 26, 2012, during the "Elvis Duran and the Morning Show" and was digitally released the following day as the lead single from "Unapologetic".  Def Jam Recordings serviced the single to contemporary hit radio in the United States on October 2. "Diamonds" is a song recorded by Barbadian singer Rihanna for her seventh studio album, "Unapologetic" (2012).  "Diamonds" is a mid-tempo pop, electronic and R&B ballad that features heavy synthesizers, orchestral sounds and electronic rhythms.  The song's lyrics serve as a departure from the themes of unhealthy relationships that were on Rihanna's previous singles and contain a prominent concept of love. <SEP>  As a music video director, his most notable and frequent collaborator is Rihanna.  The two have worked on sixteen music videos together throughout her career, beginning with "Unfaithful" in 2006 and most recently "Diamonds" in 2012.  He has also written and directed music videos for many other prominent artists including the Spice Girls, Jay Z, Beyoncé, Eminem, Usher, Shakira, Taylor Swift, The Killers, Selena Gomez, Justin Bieber, 50 Cent, Ne-Yo, Nicki Minaj, Drake, Snoop Dogg, Lenny Kravitz, Cheryl Cole, M.I.A., Mary J. Blige, fun.  and Lana Del Rey. Anthony Mandler (born April 18, 1973) is an American film director, music video director, television commercial director and photographer. <SEP> Barbadian singer Rihanna has released four video albums and appeared in fifty-two music videos, six films, ten television programs, and eight television commercials.  In 2005, Rihanna signed a recording contract with Def Jam Recordings and released her debut single "Pon de Replay", taken from her first studio album "Music of the Sun" (2005).  Like its lyrical theme, the music video for the song was inspired by disco and dance; it was directed by Little X.  Three separate videos were released for "SOS", the lead single from her second studio album "A Girl Like Me" (2006), all of which contained various dance sequences.  The same year, American director Anthony Mandler directed the accompanying music video for the second single "Unfaithful", which featured Rihanna in a dangerous love triangle with her lover and her husband.  "Unfaithful" was Rihanna's first collaboration with Mandler; they later worked together regularly.  Also in 2006, Rihanna played herself in the third installment of the "Bring It On" film series, entitled "".