What group, that spent 27 weeks at the top of the UK albums chart in 1967, featured Albert Stubbins on the cover of their album?
Sgt. Pepper's Lonely Hearts Club Band:  Released on 26 May 1967 in the United Kingdom and 2 June 1967 in the United States, it was an immediate commercial and critical success, spending 27 weeks at the top of the UK albums chart and 15 weeks at number one in the US.
i don't know