Question: Mikky Ekko (born John Stephen Sudduth), is an American recording artist and record producer from Louisiana, signed to RCA Records, he's best known for being featured on Stay, a 2013 single of Rihanna's, for her seventh studio album, "Unapologetic", released in which year?
Sentence (from "Stay (Rihanna song)"): "Stay" was co-written by Ekko and Justin Parker.
Relevant evidence: No