Various hot artists have taken part in Epik High's new album 'sleepless in __________.'

The hip-hop trio is making their first comeback since leaving YG Entertainment. Their long-awaited new music has been perfected with the help with several musicians, the first being singer-songwriter Sunwoo Jungah. Based on the polaroid teaser image, it's assumed 4 other artists have also taken part. Their identities will be revealed soon in upcoming teasers.  

'sleepless in __________' will be fully out next week on March 11.