‘Tis the season for free tributes to pop albums of yesteryear. Earlier this year Paper Bag Records put out a free tribute to Madonna’s True Blue. Now, Canadian label Peppermill Records has collected a tribute to Ace of Base’s The Sign. Titled It’s Not a Day for Work (from a line in “All That She Wants”), the collection showcases a sprawling diversity in tackling every song off the chart-topping album. What’s next, Aquarium?