Işın began her musical career as vocalist for Sezen Aksu. In 1997, she performed songs in the Turkish translation of Disney's Hercules' Soundtrack. She also performed the Turkish translations of this album. In 1999 she became the lead vocalist of the musical group "Panic Attack", but the group separated before releasing any albums. In 2000 she competed for Turkey on Eurovision Song Contest's pre-eliminations with "Bir Kırık Sevda". She didn't pass pre-eliminations for Eurovision but she represented Turkey in the OGAE Second Chance Contest and became 7th with 104 points. One year later she tried again with "Kaderimsin", but again she wasn't selected to represent Turkey for Eurovision. In OGAE Second Chance Contest, "Kaderimsin" became 14th with 52 points. She also appeared in Sezen Aksu's music videos "Oh oh" and "Allahın Varsa". In 2000, she was featured in "Geçmişe Yolculuk" from Fresh B's "Gerçek Kal" album. Until 2001 she continued working as back vocalist of Sezen Aksu. She also modeled for the XL fashion company "Sumak"'s Fall-Winter catalog in 2004–2005. She and her brother Akın Büyükkaraca own a musical production company: Akış Production.