"Which Beatles album had a pop art cover"? General knowledge question on tonight's Mastermind programme.

And on reading yesterday's paper late last night I spotted this as well:
"When the Beatles released ... All you need is love ... it became synonymous with the free-loving flower power movement that was the 1960s.  Almost half a century later, listeners have no time for such sloppy lyrics ... the word "love" is less likely to be used than ever before" The Times. (20/03/2014) p15
In other words, love is not all we need.