Gwen Stefani helped son Kingston ring in his third birthday at midnight Tuesday morning by serenading him on stage.

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"Is it 12 o'clock yet?" she asked the crowd during No Doubt's show in Salt Lake City, Utah, carrying her son on stage.

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Along with the help of the audience, she then sang the boy "Happy Birthday" as Kingston playfully covered his ears.

Stefani and No Doubt perform tonight in Denver, Colo.