A witness said the injured man was unconscious with his head against the kerb when medical help arrived.
Three people have been charged after assault at Union Terrace on Saturday night.
Scottish singer Eddi Reader has spoken of her shock after witnessing an alleged street attack in the centre of Aberdeen.
Around 1,800 people braved plunging temperatures in Aberdeen to raise money for the homeless.
A musical legend is hoping that it will be perfect when she entertains crowds at an Aberdeen charity event aimed at eradicating homelessness.
A MAJOR new festival of music and song is being launched in Aberdeen this autumn featuring a raft of big name acts and emerging talent.