Veteran lyricist AZ is set to drop his sixth solo album Undeniable on April Fools' day, but his guest list suggests it's no laughing matter.

The album, which is slated to hit shelves on April 1 on Koch will feature the Brooklyn ryhme sayer sharing mic time with several artists including Ray J, Styles P and Jay Rush. The new disc will also feature production from Large Professor, Fame, Nottz and Street Radio.

The album will be AZ's sixth solo effort and will be the follow-up record to 2005's A.W.O.L. The LP's lead single "Undeniable" is currently being serviced to urban radio outlets.

AZ made his first appearance on wax alongside long-time collaborator Nas on the classic Illmatic track "Life's A b*tch." Since then, he's released several memorable albums including his 1995 debut disc Doe Or Die and later releases Pieces Of A Man and Aziatic.

Undeniable is set to hit stores on April 1 on Koch Records.