Here is a better solution than reverb which tends to muddy the sound and place the vocal back in the mix. Use delay instead. It gives a similar effect but like using flat wound strings on a guitar or bass provides better string separation and clarity by removing some of the undesirable over and undertones. Try these guidelines. You want the delay to be in the same tempo/bpm range as the vocal. Get a calculator. Punch in 60,000. Now divide that by the beats per minute/bpm of the music. That will give you the value of a quarter note. It can sound nice as a single slap back delay and enhance the vocal but if you don't keep the dry signal high and the wet signal correspondingly low it can be way to much. If you divide that number by two it become eighth notes. Divide in two again and you have 16ths. This is the range I find works best generally but each range depends qualitatively on the relation between the dry and wet settings. Anyway, the delay enhances the voice much like reverb but everything sounds crisper and clearer. The point is that everything is totally in sync with the bpm of the music and vocal so it has no random elements involved. You can also experiment with a short delay and add a slightly longer delay for good effect. It's all in the ears though so in the final analysis, experiment. You'll have fun with a new adventure as well.