Article continues below advertisementNina Dobrev knows how to do summer right.The Vampire Diaries alum turned heads over the weekend as she lounged poolside with a friend, rocking a tiny bikini that showed off her toned figure in an Instagram post. Article continues below advertisementSource: @nina/InstagramNina Dobrev stunned in a tiny bikini while lounging poolside with her friend.Article continues below advertisementIn another close-up snap, the two switched things up and hit up a yacht, soaking in the sunshine with fun floats as they were all smiles while flaunting their toned tummies.