this is really good
the lighting on this was the first thing i looked at and it was very detailed, nice work on that one. the second was the background and you didn't put that great effort into it like from behind the girls back you made it alot more of a darker shadow than what it was intended to be, but that's the only thing wrong is your shadow the background is good. Now the girl itself you just nailed easily. this is from my perspective but if you want to draw a sexy female with the background included. try to work up more on the background ok?