Feeling free! Britney Spears, 40, was glowing in a new Christmas Eve Instagram posted by fiance Sam Asghari on Dec. 24. The pop star was all smiles while her hunky husband-to-be wrapped a brawny arm around her in the loved-up snapshot, which he captioned, “A very Merry Xmas” along with a tag for Britney. The “Toxic” singer was relaxed but elegant in a silky blue and pink crop top, rocking her blonde tresses loose while Sam looked slick in a short sleeve black and white button-down.