Keith's visit was synced up with the day tickets went on sale for the North American "50 & Counting" tour shows this spring, which start next month in Los Angeles.

Fallon and Richards spoke about a variety of topics, including Keith's famous lemon trees, a legendary story involving saxophonist Bobby Keys, and the band's upcoming tour.

"The shows the end of last year were too overwhelming for us, actually," he explained. "I mean, c'mon, this was begging for more .. and so were we. You get antsy when you're not on the road."