LSU women’s gymnastics hoisted a national championship trophy on Saturday and one of its biggest stars quickly sounded off on social media as senior Livvy Dunne celebrated the win. In a series of Instagram stories, Dunne celebrated the achievement of her and her teammates. All told, she kept the messages short and sweet. “Natty champs baby” one caption read. “Best day ever!” she said in another with a picture of the team hoisting the trophy. The Tigers had a close call to win the first-ever titleThe LSU women’s gymnastics team is bringing home a national title, besting a crowded field of compe…