Question: Who sung the Hindi song Phir Wani in a movie that tells the story of a teenage detective played in lead role by Ranbir Kapoor? 
Context: Raajneeti (English:"Politics"), is a 2010 Indian political thriller film co-written, directed and produced by Prakash Jha, with a screenplay by Anjum Rajabali and Prakash Jha, and starring Ajay Devgn, Nana Patekar, Ranbir Kapoor, Katrina Kaif, Arjun Rampal, Manoj Bajpayee and Naseeruddin Shah in the lead roles.  It was originally produced by Prakash Jha Productions and distributed by UTV Motion Pictures and Walkwater Media.  It was shot in Bhopal.  The title translates literally as "Politics" and contextually as "Affairs of State."  The story draws parallels to the epic "Mahabharata" where shades of Krishna (Nana Patekar), Arjuna (Ranbir Kapoor), Bhim (Arjun Rampal), Duryodhana (Manoj Bajpai), Karna (Ajay Devgan), and Draupadi (Katrina Kaif) can be seen in the characters portrayed. Jagga Jasoos (English: "Detective Jagga") is a 2017 Indian mystery comedy adventure film written and directed by Anurag Basu, and produced by Basu and Ranbir Kapoor.  The film features Ranbir Kapoor and Katrina Kaif in lead roles, and tells the story of a teenage detective in search of his missing father.  The film was released on 14 July 2017. Phir Wahi is a Hindi song from the soundtrack of Jagga Jasoos.  The song is written by Amitabh Bhattacharya, composed by Pritam and sung by Arijit Singh.  The song's music video is pictured upon actor Ranbir Kapoor. "Ae Dil Hai Mushkil" (English: "This Heart is Complicated") is a Hindi song from the soundtrack of the Indian film "Ae Dil Hai Mushkil".  It is written by Amitabh Bhattacharya, composed by Pritam and sung by Arijit Singh.  The music video of the song is picturised on actor Ranbir Kapoor. "Kabira" is a Hindi song from the 2013 Bollywood film, "Yeh Jawaani Hai Deewani".  Composed by Pritam Chakraborty, the song is sung by Rekha Bhardwaj and Tochi Raina, with lyrics by Amitabh Bhattacharya.  The music video of the track mainly focuses on actors Ranbir Kapoor, Deepika Padukone and Kalki Koechlin.  A encore version of the same song was released as part of the film soundtrack, which was rendered by Arijit Singh and Harshdeep Kaur. "Dilliwaali Girlfriend" (English: Girlfriend from Delhi) is a Hindi song from the 2013 Bollywood film, "Yeh Jawaani Hai Deewani".  Composed by Pritam Chakraborty, the song is sung by Arijit Singh and Sunidhi Chauhan, with lyrics penned by Kumaar.  The music video of the track features actors Ranbir Kapoor and Deepika Padukone.  at "Ilahi" is a Hindi song from the 2013 Bollywood film, "Yeh Jawaani Hai Deewani".  Composed by Pritam Chakraborty, the song is sung by Arijit Singh, with lyrics by Amitabh Bhattacharya.  The music video of the track features actor Ranbir Kapoor.  A reprise version of the same song was released as part of the film soundtrack, which was rendered by Mohit Chauhan. Wake Up Sid is a 2009 Indian coming of age comedy drama film.  Directed by Ayan Mukerji and produced by Karan Johar's Dharma Productions, the movie was distributed by UTV Motion Pictures, with visual effects contributed by the Prime Focus Group.  The film takes place in contemporary Mumbai and tells the story of spoiled, careless, rich-kid Sid Mehra (Ranbir Kapoor), a college student who is taught the value of owning up to responsibility by Aisha (Konkona Sen Sharma), an aspiring writer from Kolkata.  It was critically and commercially successful.  Ranbir Kapoor won numerous awards for his performance, and the film's soundtrack was vastly popular. Yeh Jawaani Hai Deewani (English: "This Youth is Crazy"), is a 2013 Indian romantic comedy-drama film, written and directed by Ayan Mukerji and produced by Karan Johar.  It stars Ranbir Kapoor and Deepika Padukone in lead roles.  This is their second film together after 2008's "Bachna Ae Haseeno".  Kalki Koechlin and Aditya Roy Kapur play supporting roles.  Madhuri Dixit appears in an item number with Ranbir Kapoor.  Initially set for a March 2013 release, the film was released on 31 May 2013.  Upon release, it received mixed to positive reviews and was a box office success.  They showed a perfect chemistry between friends on the screen.  In 59th Filmfare Awards, the film received Highest number of nominations (9) including Best Actor, Best Film, Best Direction, Best Supporting Actor and Actress and so on. "Yeh Jawaani Hai Deewani" has become one of the highest grossing Bollywood films worldwide.  It is also the tenth highest grossing Bollywood film in overseas markets up until then. "Sooraj Dooba Hain" (English: The Sun Has Set) is a Hindi song from the 2015 Bollywood film, "Roy".  Composed by Amaal Mallik, the song is sung by Arijit Singh and Aditi Singh Sharma, with lyrics penned by Kumaar.  The music video of the peppy, dance track features actors Jacqueline Fernandez, Ranbir Kapoor and Arjun Rampal.
Answer: Arijit Singh