This weekend, April 22nd and 23rd, Key Chorale welcomes back The Lubben Brothers, an acoustic folk group made up of triplet brothers Michael, Tom, and Joshua, to re-create and re-imagine the music of the folk-rock genre. The Key Chorale Chamber Singers will explore the 30-year discography of the folk-rock group Crosby Stills & Nash, and other artists known for their intricate vocal harmonies and timeless melodies. CSN meets choral music! The groups will combine on several of their classics including “Judy Blue Eyes,” “Marrakesh Express,” “Teach Your Children” and “Our House.” They will also perform “Seven Bridges Road” by the Eagles and a folk-inspired arrangement of Neil Young’s “Old Man” by the Wailin’ Jennys. Triplets and high-energy acoustic musicians, The Lubben Brothers specialize in tight vocal harmonies and an eclectic blend of folk instruments involving banjo, mandolin, tin whistle, accordion, hammered dulcimer, and fiddle. Diving into classical music at a young age, their modern songwriting style merges folk roots with complex pop ideas. They will be joined by electric bass, electric guitar and drums. The performances: Saturday, April 22, 4 PM, Church of the Palms; Sunday, April 23, 5 PM, St. Boniface Episcopal Church. Tickets are $35-$45. For tickets, go to keychorale.org or call the box office at 941-552-8768.