Beyonce and her sister Solange Knowles are set to host a lavish birthday party for their mother Tina in New Orleans, Louisiana on Saturday (11Jan14). The stars have sent out invites for the black tie bash, which will be held "in the tradition of an old New Orleans masquerade party", and cost an estimated $100,000 (£62,500), according to Stylist Tina Knowles turned 60 on 4 January (14).