KFED has not gotten a congrats from the QUEEN

Kevin Federline's an understanding guy. The mother of his 2 kids -- aka Britney Spears -- is probably busy buying Fantas (Cheetos) at the 7 Eleven, and that's why she hasn't congratulated him on his wedding.

As you know ... KFed tied the knot with Victoria Prince last weekend in Vegas. They been together for years and have a kid.