CREATE TABLE table_28208 ("Celebrity" TEXT, "Known for" TEXT, "Age" FLOAT, "Professional" TEXT, "Series" FLOAT, "Place" TEXT, "Dances" FLOAT, "Highest score" FLOAT, "Lowest score" FLOAT, "Aggregate" FLOAT, "Average" TEXT)

What was the aggregate for Ricky Groves?
SELECT MAX("Aggregate") FROM table_28208 WHERE "Celebrity" = 'Ricky Groves'
SELECT MAX("Aggregate") FROM "table_28208" WHERE "Celebrity" = 'Ricky Groves'