Cardi B is celebrating her 28th birthday on Sunday (October 11) and her estranged husband Offset gave her a surprise present to kick off the weekend! The 28-year-old Migos rapper placed a birthday billboard for Cardi on Sunset Boulevard in West Hollywood, California. Cardi posted a video on her Instagram account from when she saw the billboard for the first time. It has a photo of Cardi and her daughter Kulture and reads, “Happy birthday Mommy.