I HAVE SEEN THIS BIRD SEVERAL TIMES IN MY BACKYARD AND I AM NOT SURE WHAT IT IS. DOES ANYONE KNOW ? I LIVE?

IN A SUBURB OF MEMPHIS, TN CALLED BARTLETT, TN. IT IS BLUE OR MAYBE TURQUIOSE, SMALL LIKE A FINCH AND HAS A VERY DISTINCTIVE YELLOW BEAK.. II HAVE LOOKED UP THE CLOSEST THING TO IT AND IT TAKES ME TO THIS .....(Yellow-billed Blue-Finch Porphyrospiza caerulescens Chris Lodge Brazil) PLEASE HELP.....THANKS IN ADVANCE.