'H2O' is the eleventh studio album from Daryl Hall & John Oates, released in 1982. A became a huge hit, and featured three top 10 US singles, one being Maneater, which was the biggest hit of their career, spending four weeks at #1 on the Billboard Hot 100 charts.The album title is a play on the chemical formula for water, where "H" is for Hall, and "O" is for Oates. 'H2O' is certified double platinum by the RIAA with sales of over two million copies.