Place a cherry in each of the 6-7 oz pop molds or paper cups. Fill halfway with root beer. Tilt to get the angled design and freeze until almost firm (1-2 hours).
Add ice cream and insert sticks. Cover and freeze for 1 hour. Slowly add more root beer, skimming any foam, until the molds are full. Cover and freeze for at least 6 hours or until firm.
Remove from freezer. Let stand at room temp for 5 minutes before unmolding.