"Do It" is a song by the American musician Underscores. It was released as the second single to her upcoming third studio album, U (2026), on November 4, 2025, through Mom + Pop and Corporate Rockmusic. Written and produced by Underscores, the song's production combines elements of electropop, dance-pop, R&B, and hyperpop. The track was released alongside its music video, directed by Underscores herself. On January 22, 2026, a remix of the song featuring South Korean singer and Loona member Yves was released.