Which are the most famous psalms?

In both Judaism and Christianity, the most famous Psalm of David, is without doubt, Psalm twenty-three, which begins, 'The L*rd is my shepherd, I shall not want.'

It prays, asking G*d to walk beside us through the 'Valley of the Shadow of death', where we should fear no evil, for His Rod and Staff are a comfort to us.

It tells of G*d anointing us, in preparation for for passing from this earth, into the Heavenly Realms, where we may live with the Chosen who have departed before us.

It has also been paraphrased in Christianity into 2 Hymns: 'The L*rd's my Shepherd', usually sung to either the tune 'Crimond' or 'Brother James' Air' and the other; 'The King of Love, my shepherd is' (Tune: Dominus Regit Me).

All are extremely popular choices at weddings and funerals, as it the reading of this particular Psalm of David.