"Ordinarily now I'd hold up a picture of the album, but CBS' standards and practices will not let me hold up the album, because ironically for an album called Solar Power, there's a photo on it of, well, where the sun don't shine," joked Colbert.
The Late Show host asked: "What was the inspiration for that?"
Lorde teased Colbert for making a dad joke and explained she had collaborated with a friend, Ophelia Mikkelson Jones, on the shoot.
Lorde lets Stephen know that she’ll be bringing a bunch of friends to the Ed Sullivan Theater very soon. #LSSCpic.twitter.com/OrbOab5MrJ
"My friend just took it. It was just me jumping over a friend on a beach. For those who don't know, it is my butt, kind of from below, and I'm in a bikini, so it's a little hardcore but it was so joyful to me.
"It felt innocent and playful and a little bit feral and sexy."
She also revealed she would be performing in New York's Ed Sullivan Theater alongside some "friends" to show Americans "what solar power is all about".
Reminiscing about his time in Aotearoa back in 2019, Colbert joked about a prank he pulled on Lorde while in Jacinda Ardern's backyard.
Colbert jokingly asked a shocked Lorde if she would like some peanut brittle, which turned out to be a fake snake inside the container.
"I just clearly did not want that peanut brittle - I was like 'um okayyyy'," Lorde said.
Lorde recently released the New Zealand tour dates for her tour of the country in February and March next year, which includes dates in Auckland, Christchurch, Lower Hutt, Upper Moutere, Havelock North, and New Plymouth.