diff --git a/lib/cartodb/models/aggregation/aggregation-templates.js b/lib/cartodb/models/aggregation/aggregation-templates.js
index 0597ed43..6b864240 100644
--- a/lib/cartodb/models/aggregation/aggregation-templates.js
+++ b/lib/cartodb/models/aggregation/aggregation-templates.js
@@ -3,13 +3,33 @@
  */
 module.exports = (options) => {
     let templateFn = aggregationQueryTemplates[options.placement];
-    console.log(options);
     if (!templateFn) {
         throw new Error("Invalid Aggregation placement: '" + options.placement + "'");
     }
     return templateFn;
 };
 
+const aggregate_columns = ctx => {
+    let columns = ctx.columns || {};
+    if (Object.keys(columns).length == 0) {
+        // default aggregation
+        columns = {
+            _cdb_feature_count: {
+                aggregate_function: 'count'
+            }
+        }
+    }
+    return Object.keys(columns).map(column_name => {
+        let aggregate_expression = columns[column_name].aggregate_expression;
+        if (!aggregate_expression) {
+            const aggregate_function = columns[column_name].aggregate_function || 'count';
+            const aggregated_column = columns[column_name].aggregated_column || '*';
+            aggregate_expression = `${aggregate_function}(${aggregated_column})`;
+        }
+        return `${aggregate_expression} AS ${column_name}`;
+    }).join(', ');
+};
+
 // Notes:
 // * ${ctx.res*0.00028/256}*!scale_denominator! is equivalent to ${ctx.res/256}*CDB_XYZ_Resolution(CDB_ZoomFromScale(!scale_denominator!))
 // * We need to filter spatially using !bbox! to make the queries efficient because the filter added by Mapnik (wrapping the query)
@@ -32,7 +52,7 @@ const aggregationQueryTemplates = {
                       AVG(ST_Y(_cdb_query.the_geom_webmercator))
                   ), 3857
               ) AS the_geom_webmercator,
-              count(*) AS _cdb_feature_count
+              ${aggregate_columns(ctx)}
             FROM (${ctx.sourceQuery}) _cdb_query, _cdb_params
             WHERE _cdb_query.the_geom_webmercator && _cdb_params.bbox
             GROUP BY Floor(ST_X(_cdb_query.the_geom_webmercator)/_cdb_params.res), Floor(ST_Y(_cdb_query.the_geom_webmercator)/_cdb_params.res)
@@ -49,7 +69,7 @@ const aggregationQueryTemplates = {
                 ST_SetSRID(ST_MakePoint(AVG(ST_X(_cdb_query.the_geom_webmercator)), AVG(ST_Y(_cdb_query.the_geom_webmercator))), 3857) AS the_geom_webmercator,
                 Floor(ST_X(_cdb_query.the_geom_webmercator)/_cdb_params.res)::int AS _cdb_gx,
                 Floor(ST_Y(_cdb_query.the_geom_webmercator)/_cdb_params.res)::int AS _cdb_gy,
-                count(*) AS _cdb_feature_count
+                ${aggregate_columns(ctx)}
                 FROM (${ctx.sourceQuery}) _cdb_query, _cdb_params
                 WHERE the_geom_webmercator && _cdb_params.bbox
                 GROUP BY _cdb_gx, _cdb_gy
@@ -68,7 +88,7 @@ const aggregationQueryTemplates = {
             ), _cdb_clusters AS (
               SELECT
                   MIN(cartodb_id) AS cartodb_id,
-                  count(*) AS _cdb_feature_count
+                  ${aggregate_columns(ctx)}
                   FROM (${ctx.sourceQuery}) _cdb_query, _cdb_params
                   WHERE _cdb_query.the_geom_webmercator && _cdb_params.bbox
                   GROUP BY Floor(ST_X(_cdb_query.the_geom_webmercator)/_cdb_params.res), Floor(ST_Y(_cdb_query.the_geom_webmercator)/_cdb_params.res)
diff --git a/test/acceptance/aggregation.js b/test/acceptance/aggregation.js
index 2576a09c..804610ba 100644
--- a/test/acceptance/aggregation.js
+++ b/test/acceptance/aggregation.js
@@ -143,7 +143,7 @@ describe('aggregation', function () {
                                 },
                                 threshold: 1
                             },
-                            cartocss: '#layer { marker-width: [value]; }',
+                            cartocss: '#layer { marker-width: [total]; }',
                             cartocss_version: '2.3.0'
                         }
                     }