We still have some time until Summer officially hits, but if you're already feeling warm, you can thank Halsey for that. Between her sultry selfies and steamy bikini shots, the 24-year-old "11 Minutes" singer is wasting no time turning up the heat this year. Oh, and have you checked out her music videos? Yep, Halsey is not playing any games. See her sexiest moments of 2019 — so far!