U.S. magazine Life & Style reports Blunt will become Mrs. Krasinski, Underwood will exchange vows with ice hockey ace Mike Fisher in Georgia and Vazquez will wed her longtime boyfriend, basketball star Carmelo Anthony, on the same day.
The publication reports Vazquez will wear a Vera Wang gown for her big day.
She says, "It's so exciting that everyone is getting married on this date."
The date has an ironic twist for Underwood - 10 July is her former love rival Jessica Simpson's birthday. The two singers clashed over reports the country star still received texts from her ex Tony Romo while he was dating Simpson.