Beyonce Knowles has bought a white dress - sparking more wedding rumors. The singer-and-actress, who is rumored to be tying the knot with her rapper lover Jay-Z, saw the blue Guy Laroche dress worn by Hilary Swank when she won an Oscar for “Million Dollar Baby” in a shop window and fell in love with it.

Beyonce rushed back to the New York store the next day and bought the dress in white without even trying it on.

A source told the New York Post newspaper: “The staff were so sweet, gracious and soft-spoken. This dress could easily be worn as a wedding gown.”

Meanwhile, Beyonce and Jay-Z have been house hunting. The couple looked at several properties in the Dominican Republic during a recent trip, including Oscar de la Renta’s Casa de Campo - a gated community featuring private beaches, four private golf courses, three polo fields, clay tennis courts and 20 swimming pools.

Properties in the private estate range from $3-6 million. It was reported that the couple were planning a Caribbean wedding last December. The couple were overheard talking about a special “four-day” celebration on a yacht off the Caribbean island of St. Barts to mark Jay-Z’s 37th birthday. The birthday bash was thought to be a cover and that Beyonce, 25, and the hip-hop mogul - who have been dating for four years - were secretly preparing to tie the knot.