Moya Brennan, lead singer of the Irish Celtic folk group Clannad, has died peacefully at the age of 73, surrounded by family at her home in Gaoth Dobhair (a Gaeltacht community in County Donegal, northwestern Ireland). Brennan co-founded Clannad in the early 1970s alongside her sister, brother, and twin uncles, and the band achieved international recognition with their 1983 single "Theme from Harry's Game," a hauntingly minimalist Gaelic-language ballad that became a landmark of Irish music. Over a career spanning more than three decades, Clannad sold millions of albums, earned a Grammy, and collaborated with artists including Bono of U2, who once described Brennan as possessing "one of the most beautiful voices the human ear has ever heard"; she is also the elder sister of Enya, who began her own celebrated solo career after an early stint with the band.