What's the song from the Jay Leno Show that goes woah-oh-oh-oh?

The song you're referring to is likely "The Tonight Show Theme" by Kevin Eubanks, who was the bandleader for The Tonight Show with Jay Leno. This catchy tune features a memorable "woah-oh-oh-oh" refrain. It became quite recognizable during Leno's tenure on the show. If you're thinking of a specific performance or guest appearance, please provide more details for a more accurate answer!