Karol G's soaking up the sun -- and our attention -- in these sexy shoreline shots for her 35th birthday!

The singer-songwriter's celebrating another year around the sun Saturday ... and we've put together these smoking hot pics of KG baring nearly all on the beach -- sun's out, buns out  ... and her chest is on full display, too.

Karol added to her floral print 2-piece with a flower tucked behind her ear. She clearly just went for a dip too ... with droplets of water still sliding down her tan bod.

While the star didn't add a second Grammy to her shelf earlier this month -- her album "Tropicoqueta" was nominated for Best Latin Pop Album -- we hope she's keeping her mind off the L with a fun birthday celebration.

Our minds certainly go blank with just one look at Karol in these shots!