"The authors pose the titular question and, in bouncy, lilting verse, provide brief, thought-provoking answers. It's a simple enough query but a meaningful one. This spirited offering delivers good answers. Following a read-aloud, children should be strongly encouraged to give their vocal chops a hearty workout. We're singing the praises of this joyful charmer." -- Kirkus Reviews

"Rhyming text lists ways music can express and share emotions. Amplifying the text's joyful tenor, Tsui's illustrations feature smiling characters. Concluding with a call to action ("What will YOU sing?"), this sampling of visually suggested styles [is] inspirational." -- Publishers Weekly