Cristián Daniel Stambuk Sandoval (born March 16, 1977, in Osorno, Chile), better known by his stage name Koko, is a Chilean singer-songwriter and producer, known for being the singer of the band Glup!
and producing artists like Kudai, Luis Fonsi, Reik, Denise Rosenthal and Maite Perroni who was also his girlfriend from 2013 to 2020.
After the split off of Glup!, Koko participated on the soundtracks of En la cama, Cesante and Los Debutantes.
Along with Cristian Heyne formed the successful pop groups Supernova, Stereo 3, Amango, CRZ, Gufi, Kudai, Six Pack and worked with singers Kel and Denise Rosenthal.
In 2006 formed part of the creation of the first virtual band Frijoles along with Luis Tata Bigorra (former Los Tetas) and Chico Claudio.