By Susan Knox Bobby Brazier and his dance partner Dianne Buswell were all smiles at the Strictly Come Dancing wrap party on Sunday as they celebrated in London after their final live tour date at the O2 Arena. EastEnders star Bobby, 20, dressed casually in a black T-shirt, blue tracksuit bottoms and flip flops for the evening while Dianne, 34, looked chic in a green floral crop top, blue jeans and a stylish black leather blazer. The professional dancer, 34, carried her belongings in a large Louis Vuitton bag and topped off her edgy look with a slick of electric blue liquid eyeliner. Dianne, wh…