07/28/2007 at 01:15 PM EDT
The wedding of Usher and Tameka Foster, originally planned for Saturday afternoon at record executive L.A. Reid's home in New York's Hamptons, has been canceled, a representative for Usher confirms to PEOPLE .
A source also says that the 70 to 100 guests who were expected at the wedding are being advised that the event will not take place as originally planned. Flower decorations have also been seen being removed from the Reid home.
In a statement, publicist Patti Webster said, "It was announced today that the wedding ceremony for Usher Raymond IV and Tameka Foster was canceled. No additional information will be given regarding the circumstances of the cancellation, but we hope the privacy of this matter will be respected."
This was to have been the first marriage for the R&B singer and actor, 28 (real name: Usher Raymond), and the second for Foster, 37, a stylist who has worked with Lauryn Hill and Toni Braxton – as well as with Usher.
The couple, who became engaged earlier this year
, first became a serious item a year and a half ago, Foster has said.
In June, the couple announced they were expecting their first child
together, due the fall. Foster has three other children from a previous marriage, to Noontime Music cofounder Ryan Glover.
Webster would not comment on whether Usher and Foster are still engaged or even remain a couple.