Kanye West -- Discovers the Next Big Rapper ... On the Street! (Epic Video)

Kanye West may have changed the life of a random dude who did an impromptu street audition and clearly impressed both Kanye and his tag-along buddy, Justin Bieber.

Cameron Grey pleaded with Kanye to give him a shot as the rapper left a Big Sean concert Saturday night at the House of Blues in WeHo. Justin stood back and watched as Grey impressively freestyled on the pavement.

Grey is just great, and a patient and smiling Kanye seemed almost blown away, asking Grey if he'd be willing to start at the bottom. Grey gave the right answer and handed Kanye his contact info.