With Sylvia Shemwell, Estelle Brown and Myrna Smith of the Sweet Inspirations in Las Vegas February 23, 1973 - See Myrna's comments below
Judging by the clothing, my hair, and the necklace that Elvis gave me, I would say that this picture is late 1972 or early (January), 1973. I do remember that the picture was taken at The Hilton, in Las Vegas, in THE SWEET INSPIRATIONS' dressing room after the last show.
Sorry, I never kept a diary, but my memory is usually right on!
All the best,