Mango Tree

This swing number features Sara Bareilles. Zac Brown told Tonedeaf.com: "Sara Bareilles killed it. I love the way she sang it, her voice, and she took time out. She's doing a musical, (Waitress) and so took time out from that to go over to the studio and I was Facetiming her while she was recording at the studio." He added: "I think she was the perfect person to have on there. (Songwriters) Niko (Moon) and Anna (Harwood) had started or written that song and it was kind of a ukulele-type, like a Jack Johnson-ish type tune, and it was cool like that. It was cool being islandy but I was walking at the beach when we were arranging the record and I was like, 'Man, what if "Mango Tree" was like big band,' like juxtaposition of that with the islandy thing, and it was fun to see a song now that could be like a big wedding song that could be done in coat and tails."

Bareilles said of Zac Brown during a Reddit AMA: "He's a dollface. He wears the beanie in the studio and we skyped while I sang. He has a wide, kind smile and a booming voice and I think he's the s--t."

Here's some mango fun facts: Mangoes were first cultivated in North East India 5,000 years ago. They were then small, fibrous fruits, somewhat like plums. 20 million tons of mangos are grown annually. Mangos are related to cashews and pistachios. Most mangos sold in the USA come from Brazil, Ecuador, Guatemala, Haiti, Mexico and Peru. A mango tree can grow as tall as 100 feet.