Halsey has had quite the sexy year. Between her sultry selfies [1] and steamy bikini shots, the 25-year-old singer wasted no time turning up the heat in 2019. Oh, and have you checked out her music videos [2]? Yep, Halsey did not come to play. We can't wait to see what she has in store for 2020, but until then, see her sexiest moments of 2019!