Jessica's New Romance

Jessica's New Romance

08/29/2006 AT 12:00 PM EDT

Jessica's New Romance Her new CD may be called A Public Affair, but Jessica Simpson has kept her budding relationship with singer John Mayer ultra private. Now after three months of flirty notes and quiet barbecues at home, the two may be ready to step out What kind of a suitor is John Mayer? The kind who sends cards and flowers. The kind who makes the new object of his affection, Jessica Simpson, "giggle," according to a source close to her. And the kind who passed the 'Daisy' test with flying colors. In the few months Mayer and Simpson have been an item, says the source, "he has even babysat for Daisy" – Simpson's beloved maltipoo mix. "If you're in with Daisy, you're in with her!"

Take it from Daisy: Mayer, 28, is officially in with Simpson, 26. And the bubbly pop star – whose promotional tour for her new album, A Public Affair, has been slowed by a bruised vocal cord – can hardly contain her delight at falling for the scruffy-haired singer-songwriter with a sensitive streak. "She's head over heels," says the source close to her. "She's telling friends, 'I'm in love.' "
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