Nau'Jour Lazier Grainger (born January 9, 2000), better known by his stage name Toosii, is an American rapper, singer, and songwriter from Raleigh, North Carolina. Beginning his career in 2017, he rose to mainstream prominence following the release of his 2023 single "Favorite Song", which first gained virality on the social media platform TikTok. The song peaked at number 5 on the Billboard Hot 100, earned double platinum certification by the Recording Industry Association of America (RIAA), and preceded the release of his second studio album, Naujour (2023). The album peaked at number 19 on the Billboard 200, although his debut album, Poetic Pain (2020), reached number 17 on the chart.