WWE Announcer Lilian Garcia -- Bad Ass Bourbon Street Karaoke

WWE announcer Lilian Garcia knows how to laissez les bon temp rouler with the best of em' ... and proved it right on Bourbon Street with a killer karaoke session.

Lilian hit up the Cat's Meow karaoke bar Thursday night and performed a surprise set -- including "Locked Out of Heaven" and "Don't Stop Believing."

Wrestlers Chris Masters and Al Snow were in the crowd -- Wrestlemania's at the Superdome this weekend -- but didn't get on the mic.