>>9039104it's part of the pattern of the shirt, not a waist outline. Lego don't do waistlines like that. It's too high up on the torso, same color as the pattern connected with it (would be separated or different color if it was a waist outline), bottom edge ends at the same line as the pattern next to it because it is the pattern too
enclosed image shows the waistline on other cheerleader minifigs lego made