Chrissy Teigen has shared a behind-the-scenes video of her latest ultrasound baby scan.The former model, who is married to singer John Legend, is currently pregnant with her third child.Teigen and the “All of Me” singer are already parents to four-year-old Luna and two-year-old Miles.On Monday, the Lip Sync Battle host shared a video that was taken during a recent scan and showed Teigen and her daughter smiling at the baby’s image on a computer screen."Lady Gaga dominates MTV VMAs""Notting Hill