She may best be known asKylie Jenner's BFF.But Anastasia 'Stassie' Karanikolaou is shining all on her own.The 23-year-old model brightened up her 8.4million followers' Instagram feeds on Monday as she shared a very sultry snap of herself in a yellow thong bikini.Stassie absolutely scintillated in the canary yellow two-piece swimsuit from celeb-favorite OH POLLY.Scroll down for video Summer vibes:Anastasia 'Stassie' Karanikolaou brightened up her 8.4million followers' Instagram feeds on Monday as she shared a very sultry snap of herself in a yellow thong bikini Make a splash like Stassie in Oh Polly swimwear £40 Oh Polly 'Chase the Sun' bikini set Buy it here Buy now Oh Polly is renowned for its sexy eveningwear and sassy swimwear.