BASE is the first solo record by Jonghyun of SHINee, released under SM Ente… Read Full Bio ↴BASE is the first solo record by Jonghyun of SHINee, released under SM Entertainment on January 12, 2015.
During his first performance for the promotions of the album, Jonghyun said "For this album, I focused on introducing my style of music and what I would like to pursue in my musical career. I wanted to make an album filled with songs I like, and work with musicians who inspired me. When deciding who to collaborate with for this album, I chose artists who can express the songs best."

Jonghyun collaborated with various artists for this album, such as Younha, Wheesung, Zion.T and Iron. On January 7, Jonghyun released his self-composed song "Déjà-Boo", which is co-produced by Zion.T who also features on the track. The song is described as a "retro funk song with a synthesizer comping melody and the funk rhythm of a bass".The song shot to No.1 on real-time music charts and achieved an all-kill right after its release.
On January 8, Jonghyun pre-released "Love Belt", another self-composed song which is a collaborative track with Younha, on his radio show "Blue Night". His title song, featuring Iron as the rapper, is called "Crazy (Guilty Pleasure)" and was released digitally on domestic music sites on January 12, 2015 together with the rest of the album.