Hugh Henry has made available a booklet for Vespers of New Year's Eve (1st Vespers for the Octave of the Nativity according to the extraordinary form) ending with Benediction and the singing of Laudes Regiae (Christus Vincit). But coolest of all is the recording of Christus Vincit by Juventutem. The strength and energy of this hymn in praise of Christ Our Lord and King blew me away! Have a listen, and then sing along.
Christus vincit. Christus regnat. Christus imperat. Exaudi Christe.
Christ is victor, Christ is ruler, Christ is Emperor. O hear our prayer, Christ.