What are three great songs from the 1960s?

Respect - Aretha Franklin

A Change is Gonna Come Sam Cooke

Space Oddity - David Bowie

My favourites from then, at the time, are actually instrumentals...

The Shadows - Apache

Tornados - Telstar

B Bumble and the Stingers - Nut Rocker

Ones that I remember from then (rather than hearing or liking them later) because my older relatives played them so much:

Matt Monroe - Born Free

Manfred Mann - Mighty Quinn

Johnny Tillotson - Poetry In Motion

And some I developed a liking for as I got older, in the early 70s (but 60s releases):

Creedence Clearwater Revival - Bad Moon Rising

Van Morisson - Brown Eyed Girl

Deep Purple - Hush

They are not really great unless people still sing them.  Many songs from the 60's have been forgotten.

Gimme Shelter - Rolling Stones

God Only Knows - Beach Boys

Sound of Silence - Simon and Garfunkel

A Day in the Life - The Beatles 

Space Oddity - David Bowie

Ronnie - Frankie Valli and The Four Seasons

far too many to choose from , ranging from the likes of Frank Sinatra  to the Beatles , and all in between they were good years .