CelebrityStyleGuide.com is a famous website that compares different merchandise and stuff used by celebrities. Its "Family Game Night, Celebrity Style" blog features Sing Along Pro as the very first product where Goldie Hawn and Kurt Russell are playing with it. On top of that, it also got some very good and positive reviews. According to it "The sound is great and the echo feature is very fun. The kids love it."
To check out the complete blog Click here