Undrop, a Swedish/Spanish indie rock band, was formed by Swedish brothers Tomas Rundquist and Steffan Rundquist alongside bassist Antonio Crespo. Their breakthrough came with the 1998 single "Train" from the debut album The Crossing, which reached Number 1 on the Los 40 Principales chart after being featured in a national Pepsi campaign. In 1999, the band released Boomerang under Columbia Records, followed by the 2001 album Uprooted on Locomotive Records, featuring collaborations with Amparo Sánchez. After a brief hiatus, they self‑released the album Party The Album in 2008.
