The Hollies

The Hollies are an English pop group formed by Allan Clarke and Graham Nash in the early 1960s. Known for their distinctive vocal harmony style, they became one of the leading British groups of the 1960s and early 1970s. They enjoyed considerable popularity in many countries, although they did not achieve major US chart success until 1966. Nash left the group in 1968, and then formed Crosby, Stills & Nash. The Hollies had 30 charting singles on the UK Singles Chart, and 21 on the Billboard Hot 100, with major hits on both sides of the Atlantic that included "Just One Look", "Look Through Any Window", "Bus Stop", "I Can't Let Go", "On a Carousel", "Stop Stop Stop", "Carrie Anne", "Jennifer Eccles", and the later "He Ain't Heavy, He's My Brother", "Long Cool Woman in a Black Dress" and "The Air That I Breathe".

source: Wikipedia