Premise: Four Pink Walls is the debut extended play (EP) by Canadian singer Alessia Cara. It was released on August 26, 2015 through Def Jam. With all songs containing writing by Cara, the preview of her upcoming debut studio album "Know-It-All" also includes major songwriting and production contributions from the duo Pop & Oak.
Hypothesis: Def Jam is the label that released Alessia Cara's EP, Four Pink Walls.