Sharp On All 4 Corners: Corner 1 is the twenty first studio album by American rapper E-40. The album was released on December 9, 2014, by Heavy on the Grind Entertainment. The album features guest appearances from Boosie Badazz, T-Pain, Kid Ink, B.o.B, Turf Talk, Cousin Fik, Ezale, Vell, Adrian Marcel, Willie Joe, Nef The Pharaoh, Too Short, B-Legit and Otis & Shug. The album was supported by the singles "Red Cup" and "Choices (Yup)".