Thadeus Labuszewski (born January 26, 1999), professionally known as Disco Lines, is an American musician, DJ, music producer, and songwriter. He is best known for his 2022 single "Baby Girl", which has 200 million streams on Spotify. Early life. Disco Lines was raised in Colorado and graduated from University of Colorado Boulder. He started EDM in middle school when he heard Skrillex's "Scary Monsters and Nice Sprites". Career. In 2020, Disco Lines released a remix of "Love Story" that went viral on TikTok. On April 14, 2022, Disco Lines released "Baby Girl" his first single since signing with Arista Records. The song debuted number 25 on the "Billboard" Dance/Electronic Songs chart. Disco Line started his own record label, Good Good Records in June 2023. Wes Mills became the first artist signed to the new label.