Question: Who wrote the first song Anthony Mandler directed the music video for with Rihanna?

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 "". <SEP> American singer and occasional actress Lana Del Rey has appeared in three films as an actress, eighteen television shows, and three commercials, along with offering her talents to five films as singer.  Del Rey's first appearance was in the independent film "Poolside" (2010), which features Del Rey playing Lisa, a rich girl who spends her days smoking cigarettes by the pool.  She received top billing for the project.  Del Rey's next appearance was in a less-than-one-minute long short art film titled "Lana Del Rey" which was produced by Interview magazine and features noir-ish style and cinematic themes.  Del Rey's breakout appearance was in an Anthony Mandler directed film, which Del Rey wrote, titled "Tropico" (2013).  The film features Del Rey as a fictionalized version of Eve while also playing the Virgin Mary.  "Tropico" received positive reviews and was Del Rey's second film that gave her top billing.  Along with appearing in a handful of short films, Del Rey has appeared in 18 television shows and specials as herself along with appearing in campaign commercials for companies including Keds and H&M. <SEP> Anthony Mandler (born April 18, 1973) is an American film director, music video director, television commercial director and photographer.  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. <SEP> "Unfaithful" is a song by Barbadian singer Rihanna from her second studio album "A Girl like Me" (2006).  The song was released by Def Jam Recordings on May 2, 2006, as the second single from the album.  It was written by Shaffer "Ne-Yo" Smith with the song's producers StarGate.  "Unfaithful" is a pop and R&B ballad and was inspired by the works of American rock band Evanescence.  Originally titled "Murderer", the single speaks about a woman who regrets cheating on her partner.