Sommer Ray's Beach Picnic, Nothin' but Toasty Buns and Watermelon!

Sommer Ray is bummin' it up this summer -- the influencin' model recently boasted her curvaceous bod (and summer snacks) on social media, leaving her 23.3 million Instagram followers' jaws on the floor ...

Just one in a million melon, the 28-year-old Colorado native served up some sweet and juicy watermelon before turning over to tan her backside.

Sommer recently hard-launched her new relationship with Mark Estes -- who previously dated Kristin Cavallari -- and needless to say, Mark's got his hands full now!