The late Anna Nicole Smith’s daughter, Dannielynn Birkhead, has gone full-on goth. Dannielynn turned 20 years old Monday and her father, Larry Birkhead, shared two new pics of her sporting a bold new look as he wished her a happy birthday on Instagram. In one pic, Dannielynn rocks a striking bright red short hairdo while wearing an oversized black Ghost t-shirt from Hot Topic. In another pic, her hair is platinum blond, and she dons a black velvet off-the-shoulder dress, fishnet tights, black leg warmers and big sunglasses. Larry shared that the all-black outfit was from Hot Topic’s collaboration with alternative and punk-inspired…