"Hold On" is a song by Canadian singer Justin Bieber. It was released on March 5, 2021, by Def Jam as the fourth single from his sixth studio album, Justice. The song was written by Bieber alongside Ali Tamposi, Jon Bellion and producers Andrew Watt and Louis Bell. "Hold On" interpolates the 2011 song "Somebody That I Used to Know"; writers Walter De Backer and Luiz Bonfá were given official songwriting credits. A music video starring Bieber and Christine Ko was released alongside the song. The single has reached the top ten in twelve countries worldwide and has reached number four on the Billboard Global 200 chart.