Article continues below advertisementCamila Cabello is turning up the heat!The 28-year-old singer took to Instagram to post a carousel of snaps, including a steamy bathroom selfie where she showed off her toned abs in a black bikini. In the pic, she pulled down her black shorts slightly, teasing her thong and leaving fans swooning.Article continues below advertisementSource: @camila_cabello/InstagramCamila Cabello shared a steamy bathroom selfie in a black bikini.