"How Will I Know (Who You Are)" is a song recorded by Swedish singer Jessica Folcker, released in 1998 by Jive and Zomba Records as the second single from Folcker's first studio album, Jessica (1998). The song is written by Andreas Carlsson, Kristian Lundin and Max Martin, and produced by Lundin. Carlsson also provided backing vocals. Lyrically the song describes the hard feelings of letting go of a relationship and saying goodbye. It became an international hit and went platinum in Sweden, after reaching number seven on Sverigetopplistan. Additionally, "How Will I Know (Who You Are)" was a top-10 hit also in Austria and the Netherlands, and a top-20 hit in Belgium, Denmark, Norway and Switzerland. On the Eurochart Hot 100, the song peaked at number 33 in April 1999.