The red color tones on Alex and Lynn are true strategic method creation that Celtic Woman has always done to it's girls dresses from ANJ to SFTH.
taking some of the bright red from Susan to half of Lynn's dress and parts of both reds from Meav and Lisa L to half of Alex's dress in order for the group to blend in.
Lynn's dress inspiration came up after the one she alternated during Emerald instead in the color of red.
Lynn intended to have a mic hold as all the other girls did though the final decision was put off to make point she was holding it toward the back to resemble
her pause to sing while the other's sang.
Reference: Alex's real dress which is real would of fitted perfectly had she continued with CW for HFC.