CMDs of two of the GCs surveyed by VVV: in the upper panels, the metal-rich NGC 6440, and in the lower panels, the metal-poor NGC 6656 (M 22). The panels on the left show the inner regions of the GCs where most of the stars belong to the cluster, and the evolutionary sequences of the GC are clearly visible (RGB and RC for NGC 6440; HB, RGB and upper MS for M 22). On the left, we are including stars that are further away from the cluster center. Field stars start to dominate in the CMDs. In the upper right panel, stars from the RGB for NGC 6440 mixed with field bulge stars in the CMD. In the lower panel, the sequences from the bulge are clearly visible too, but the confusion with stars from M 22 is less important since M 22 is much closer than the bulge.