"I was hoping for that victory," Korn said, "but I wasn't so sure when were down 10 in the second half."
Blackmon, who will be among the leading candidates for Indiana's Mr. Basketball award next fall, led the way with 27 points. Park Tudor's Trevon Bluiett added 17 points and 10 rebounds, and Greensburg's Bryant McIntosh finished with 10 points.
Chris Cunningham, a late addition to Kentucky's roster, led the visitors with 20 points.
Korn has made the most of his time with the All-Stars so far, and he's looking ahead to next week's game against the Seniors.
"These are great guys," he said. "Everybody gets along. Everybody's great."