Doraemon (1979)

I'll Become a Singer By Eating Candy (1x27)

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Doraemon and Nobita are invited to another of Gian's singing event. This time, Doraemon gives Gian candy that lets him sing like a real singer by storing the voice in the candy. Gian believing it to be his own voice, enters a televised youth singing contest. The problem. however is the candy only lasts 30 seconds before wearing off.