Hollis Wong-Wear, known mononymously as Hollis, is an American singer-songwriter and creative producer. She is best known for featuring on "White Walls", a song by Macklemore and Ryan Lewis, which also featured Schoolboy Q. Hollis is also a spoken-word artist. Her major debut was on Macklemore & Ryan Lewis' debut album, The Heist. This was followed by the single "White Walls" in which she did the vocals for Macklemore and Ryan Lewis. This song peaked at number 15 on the Billboard Hot 100 chart.