Sisters Niki and Gabi are “opposite twins”—one a “girly-girl” and the other a “hipster.” The fashion and beauty queens grew their already massive following even more in 2017, reaching the 6M+ subscriber mark by posting weekly videos about a variety of topics. While their shared channel has transitioned from original music to vlogs, the sisters still share songs every now and then, including RU, the catchy tune with over 6.8M views. They also made headlines when vlogging their “24 Hr Conjoined Twin Challenge,” trying to complete their daily routine in a Christmas sweater knit for two. The sisters have clearly found a recipe for success, as 2017 marked the third straight year their channel added over a million subscribers