H.Y.
I think 16mths seems a little young to potty train, but i would make a big deal about getting "big girl panties" & let her go pick out her own panties. Set a date to start so she's prepared & that day just take the diapers off. She might make a mess a few times (trust me it'll happen & thats ok) but eventually she wont want to ruin her panties or walk around wet. The day i started potty training my son i just threw out all the diapers, even at night, & kept him in underwear. It only took a few days & we had no accidents. I also told him if he went a week w/just a few or no accidents then we'd go see the new Buzzlight year movie (that was the coolest at the time). It worked. Good luck.