Has Britney Spears moved on from Sam Asghari with a mystery man? After the pop star went on a posting spree Friday, March 22 — where she shared a series of clips from her beach vacation — fans took to X, formerly known as Twitter, to speculate who kissed Spears on the forehead in one of the sun-soaked clips. The video in question showed the blonde beauty, 42, on a boat alongside the hunk as they smiled and enjoyed the crystal-clear water. Spears wore a hot pink bikini and white tall boots, while the other individual had on black swim shorts and black shades. “Literally my white boots on the be…