It is a HSM2 Wii game that my MIL bought in Nov at TRU. I can't really ask her for the receipt, and it's after the 45 days anyhow. She bought the one without the mic by accident, so we can't use it without paying more $ for a mic. HSM3 "Sing it" is coming out next week and we would rather have that anyway.
Maybe I'll just try ebay for it.