useless trivia: What Word Means: A Fine Sieve?

Questions

Beatle that was rumored to be dead in the late '60s?

Cuban style of music that lead to the rhumba craze of the 30's?

Guitarist with only 9 full fingers?

His ex-wife hit him with a bottle in a 1982 concert appearance?

Song in which John Lennon claims Paul was the Walrus?