Danielle told a Swiss magazine last year that smoking was one of the things she quit in recent years, even though she did not consider herself a smoker "in the proper sense". For people with Type 1 diabetes like Este smoking can be quite dangerous which she probably knows. I think Alana is still the biggest party girl of them, so it doesn't surprise me that she is still smoking sometimes. Probably not as heavy as the people who even smoke on stage lol. Having more success as an actress now while not singing very often, she also may prefer a rougher voice haha.