This rare bikini candid of Princess Diana is the perfect July 4 inspiration

A photo of Princess Diana looking glam in a bikini surfaced on Instagram today — just in time for us to be inspired by the royal icon's summer fun for July Fourth. The snapshot was taken on a 1990 trip on the T.M. Blue, according to the post's caption. 

Summer is here TBT princess Diana on the TMblue 1990 #princessdiana #rosariosaxecoburg

A post shared by Privategg (@giancarlogiammetti) on