Singer GERRY RAFFERTY died yesterday . . . after losing a battle with "an undisclosed illness."  He was 63.  A cause of death hasn't officially been revealed, but that illness probably had to do with his liver.

--Gerry had reportedly been sick since November when he was hospitalized with liver failure.  (--He had his struggles with alcoholism . . . particularly in the '80s.)

--Gerry is best known for his '70s hits "Baker Street", "Right Down the Line" and "Stuck in the Middle", which he recorded with the band STEALERS WHEEL.

--He was a member of the mid-'60s folk group THE HUMBLEBUMS, which also featured Scottish comedian BILLY CONNOLLY.

--"Stuck in the Middle" experienced a rebirth in the '90s, after QUENTIN TARANTINO used it in "Reservoir Dogs".

--Gerry released nine solo albums.

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