Instagram | Brittney Palmer Brittney Palmer is upping the ante on Instagram just in time for the weekend. The former UFC Ring Girl, 39, left almost nothing to the imagination in her Friday share, showcasing her phenomenal figure while clad in only a thong. Making a case for the G-string trend as she struck a pose for an artsy black-and-white photo, Brittney drove her 1 million followers wild, quickly earning fan approval. The newly married star,…