Britney Spears Tight with Ex-Fiance's BFF

9/5/2015 7:16 AM PDT

Britney Spears -- Tight with Ex-Fiance's BFF (PHOTOS)

EXCLUSIVE

Britney Spears had an interesting liaison Friday night ... playing grabsees with ex-fiance Jason Trawick's best buddy.

Britney was at XS nightclub in Vegas when she and Cade Hudson got cozy in the DJ booth and on the dance floor.  She bear-hugged him and generally looked pretty intimate.

The "bro code" clearly has a statute of limitations ... or at least it should.