I cracked into this tonight:
Brand: Frostie Blue Cream Soda.
Origin: Detroit, MI.
Purchase Place: Lunds Grocery Store, St. Paul, MN.
Sweetener: High Fructose Corn Syrup and/or Cane Sugar (I hate it when it's like the bottle doesn't even know what's in it).
Review: This is really sweet. REALLY. It could be called "bubblegum" or "cotton candy" flavor. It's not bad, it's just a really sugary cream soda. If that sounds OK to you, you'll like this. Just be ready for a sugar high.
Score: 6.5 out of 10.