Here’s a good way to pass some time on your Monday … guessing the sexy singer in this reflective bikini!!!

This smoking hot babe is one of Colombia’s finest exports … she’s big in Latin America and pretty popular in the States too.

She was missing from Instagram for about 4 months, and just came back with a vengeance … posting a bunch of sexy shots that we’re showing you here.

We definitely missed her — and her hot bod — and are glad she’s back … so check out the gallery to see what we’re talking about.

Her biggest songs include “QLONA,” “PROVENZA,” “TQG,” “+57” and “Si Antes Te Hubiera Conocido.” Not Becky G, but …