Article continues below advertisementStassie Karanikolaou is turning heads! The 28-year-old influencer - and Kylie Jenner's longtime bestie - sizzled while lounging poolside in a floral-print bikini. She sprawled across a striped towel, shades on, showing off her curves as she sipped on a Celsius drink.Article continues below advertisement"i'm literally summering. @celsiusofficial #celsiusbrandpartner," she captioned the stunning post.Article continues below advertisementSource: @staskaranikolaou/InstagramStassie Karanikolaou stunned fans with new bikini photos.