Question: "Drop That Kitty" is a song by American rapper Ty Dolla Sign, featuring English singer Charli XCX and American singer Tinashe, the  track was produced by Stargate and which Norwegian DJ, record producer, musician and turntablist, known professionally as who?
Sentence (from "Drop That Kitty"): Sign raps the track's main verses, while XCX sings its chorus hook and Tinashe its bridge and pre-chorus hook.
Relevant evidence: No