Britney Spears was back in her teeny-weeny yellow bikini for another day on the beach in Hawaii. On Monday, the singer was spotted lounging on the sand and talking a walk near the water while showing off her incredible figure . . . as well as a diamond ring on her left hand. So, is Britney gearing up to walk down the aisle for a third time? She's been dating dancer Sam Asghari since 2016, and the two rang in their one-year anniversary in November. Sam also spoiled his "one and only" on Britney's 36th birthday in December. Did his gift include a marriage proposal?