Gigi and Bella Hadid posted sweet birthday tribute to their younger brother Anwar Hadid’s girlfriend Dua Lipa, affectionately shared photos with the two-time Grammy winner on Saturday. The pregnant catwalk star captioned the post on her Instagram Story: “HAPPY BDAY DEXTER’S MOM @dualipa. You’re a special one & deserve the best. love u sister. [sic]” On the other hand, Bella referred to the 25-year-old singer as the ‘cutest, smartest, most hard-working, loving, generous bean of all time.’In the picture, Bella could be seen fondling the ‘New Rules’ hitmaker’s face while lovingly wrapping one arm around her. In celebration of his love’s special day, Anwar also shared a series of loved-up snaps.