Steven Tyler -- Music Video Sans Aerosmith

Steven Tyler has blown up even bigger because of "American Idol" -- and he's making a big move, telling our photog yesterday he's gonna shoot a music video for a new song ... and no Aerosmith.


The music video shoot will go down Monday.

By the way ... Tyler has a memoir called "Does the Noise in My Head Bother You?" coming out on May 3.

Aero-who?