When a cap and gown go on, the gloves must come off. Seemingly abiding by this combat etiquette, both Brandi Glanville, 41, and LeAnn Rimes, 31, stopped their long-standing feud in order to peacefully attend their son's (and stepson's, respectively) 5th grade graduation ceremony Tuesday. Eleven-year-old Mason is moving on up to the 6th grade and the Real Housewives of Beverly Hills star joined the country singer in deciding to use Twitter to celebrate his accomplishments as opposed to what they typically use the social platform for—exchanging jabs.