Question: Which two artists are also featured in the Jay-Z song in which Jeff Bhasker won a Grammy Award for producing?

"A Star Is Born" is a song by American hip hop recording artist Jay-Z from his eleventh studio album "The Blueprint 3" (2009).  The song, produced by Kanye West, Kenoe and No I.D., features a verse from American rapper J. Cole, Jay-Z's protege and the first artist to be signed to his Roc Nation label.  In the song, Jay-Z recognizes rappers who have risen to fame in the last decade, such as Kanye West, Lil Wayne, T.I., Eminem and 50 Cent .  Notably, Jay-Z also gives shout-outs to Mobb Deep, Nas and two artists whom he had previously insulted on his 2001 song "Takeover". <SEP> Jeff Bhasker (also known as Billy Kraven and U.G.L.Y.) is an American record producer, songwriter, keyboardist, vocalist, and multi-instrumentalist.  He has won Grammy Awards for the songs "Run This Town" by Jay-Z, "All of the Lights" by Kanye West, "We Are Young" by Fun. , and "Uptown Funk" by Mark Ronson.  He collaborated with rapper and producer Kanye West on the albums "808s & Heartbreak", "My Beautiful Dark Twisted Fantasy", and "Watch the Throne".  Bhasker received the 2016 Grammy Award for Producer of the Year, Non-Classical for co-producing Mark Ronson's album "Uptown Special" and producing Nate Ruess's album "Grand Romantic" among other records. <SEP> American singer-songwriter Bruno Mars has written and recorded songs for his studio albums, "Doo-Wops & Hooligans" (2010) and "Unorthodox Jukebox" (2012), and has written songs for other singers.  The Smeezingtons (Bruno Mars, Philip Lawrence, Ari Levine) worked in the majority of the songs in Mars' debut studio album, including writing "Count on Me" and "Marry You" together.  The team collaborated with Khari Cain and Khalil Walton on the album's lead single "Just the Way You Are", peaking at number one on the "Billboard" Hot 100.  Mars explained "I wasn't thinking of anything deep or poetic.  I was telling a story."  Mars co-wrote and co-produced the song "Talking to the Moon" with Grammy Award winning producer Jeff Bhasker.  The single "Grenade", was conceptualised after Mars heard an unreleased track with similar lyrical themes.  Mars' follow-up album, in addition to reunite collaborators from his previous album, such as The Smeezingtons and Jeff Bhasker, included new composers, such as Mark Ronson and Emile Haynie.  All of these producers worked on the lead single "Locked Out of Heaven".  The song concerns a relationship infused with positive emotion and good sex.  The idea behind the second single, "When I Was Your Man", is the regret of letting a girl get away.  Several of the songs were written solely by his production team, including the lead single, "If I Knew" and the single "Gorilla" <SEP> "Run This Town" is a song by American rapper Jay-Z.  It was written by the performing trio, with assistance from Ernest Wilson and Jeff Bhasker.  The song also features Kanye West and Rihanna.  Production of the track was made by West and Wilson (also known as "No I.D.").  "Run This Town" was released as the second single from Jay-Z's eleventh studio album "The Blueprint 3", and is used as the theme song of "Battlefield 4".