Singer Bruno Mars is back with a brand new song “24K magic”, his first single in four years. After a week of hype on social media, the 30-year-old has released the song and music video, reported eonline.com. “You can call it my first single, but I call it the invitation to the party,” Mars said. “24K magic” was written and produced by Shampoo Press & Curl, with additional production by The Stereotypes. Mars’s third studio album - also titled “24K Magic” - will come out on November 18.