To sing joyfulLY or to sing JOYfully

I've been working on the English version of the 11th motet in my Lent and Passiontide sequence from Tempus Per Annum an ongoing collection of motets for the whole church's year. This is the motet for the Easter Saturday evening mass; its not actually an introit as the mass is structured slightly differently but instead I'm setting an antiphon text, Jubilate deo with an English version of sing joyfully to God all ye Lands. This works perfectly in the opening phrase (which was written to fit the English), but later on in the motet I've been havering over exactly how to set the word joyfully. Having a long note on the final syllable, even an unstressed on, seems to be clumsy some-how. So just before finishing this morning I went through the motet and changed all the phrases where I had stretched sing joyfully out and uses sing joyfully to God instead. I'll probably haver some more and change things again.