"But I wanted it to be a little rough around the edges.
Her eponymous debut album in 2006 peaked at number five on Billboard 200 and spent the most weeks on the chart in the 2000s.
The album's third single, "Our Song", made her the youngest person to single-handedly write and perform a number-one song on the Hot Country Songs chart.
“Is there anything new under the sun, or are all things just borne from the previous million ideas?
What we’ve done is consolidate our strengths, they’ve gone into the cauldron, spun around and come out with absolute ease.
The track is one of three that features Robert Plant.
The Led Zeppelin frontman, whom Griffin is dating and with whom she collaborates in the rootsy Band of Joy, sings harmony and gets a co-writing credit for rearranging the track, Griffin says.
Robert Plant stands in the bright sunshine, eyes scanning a sunlit pedestrian square in Birmingham, while people pass on by, oblivious to the presence of one of rock and roll’s great frontmen.
“I’ve been around so long I can be easily ignored,” he notes, with twinkly amusement.
“There are only three or four frontmen left, from our time, who actually just kick the mic stand up and do it, and that’s me, Rod Stewart and Mick Jagger,” he says, thoughtfully rather than with arrogance.
“But the only important thing is, can you contemporise your gift?
"We get a lot of energy from each other's singing," she notes of their creative back and forth.