"What They'll Say About Us" is a song by American singer-songwriter Finneas. It was released by OYOY as a single on September 2, 2020. The song was written and produced by Finneas. A lullaby-influenced ballad, the lyrics were inspired by the Black Lives Matter protests and Nick Cordero's death due to COVID-19. "What They'll Say About Us" was noted by music critics for its lyrical content. A music video for the song was released alongside the song and was directed by Sam Bennett in one take. It is the first single from his debut studio album Optimist.

Finneas Baird O'Connell, also known mononymously as Finneas, is an American singer-songwriter, record producer, and actor. A recipient of numerous accolades, he has written and produced music for various artists, most notably his younger sister, Billie Eilish. He has won 10 Grammy Awards among 18 total nominations, including nominations for the Big Four categories. He has made history as the youngest act to win the Producer of the Year, Non-Classical category. For his work with Eilish, he has won Record of the Year twice in a row, Album of the Year, Song of the Year, Best Pop Vocal Album, and Best Engineered Album, Non-Classical. He was also nominated for Best New Artist for his solo work. Their song "No Time to Die" from the film of the same name earned him an Academy Award, a Golden Globe and another Grammy. Two years later, for their song "What Was I Made For?", they won the Grammy Award for Song of the Year, along with the Academy Award for Best Original Song and the Golden Globe for Best Original Song. They became the youngest 2-time Academy Awards winners ever.