Lillibet weighs nothing, she doesn't even register on the scale, she is a light weight but muscular and very very long. Faith was a tiny 2.5K when she first went to stud in 2012, after her kittens she seemed to hang onto all the extra flesh the kittens left behind. She is a lithe 3.3k now and Lillibet is not far behind,even though she looks like a feather.
I have a notion that before you are weighed it is best to release all chocolate gold from your tummy, make sure your bladder is empty, don't wash yourself because the body soaks up water into its pores and this could weigh more and finally, don't hold your breath, it's sure to weigh another ounce!
KS =^..^=