LeAnn Rimes & Eddie’s Ex Brandi Glanville Declare Ceasefire For Son Jake’s Birthday (EXCLUSIVE DETAILS)

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The co-parenting continues.

LeAnn Rimes and Brandi Glanville reunited for the second time in just over a month to celebrate their son Jake’s fifth birthday on April 15, at a Chuck E Cheese restaurant in Los Angeles, Calif.

“LeAnn organized Jake an amazing Lego Ninjago cake,” a source told Celebuzz. “It was a great day. Very peaceful and celebratory.”

It wasn’t Rimes and Glanville’s first détente either.

Last month, the former foes sat next to each other along with 29-year-old Rimes’ husband, Eddie Cibrian, at one of their son’s soccer games.

The pair have soothed tension in recent months after a long and drawn out feud, serialized in the media. Despite declaring a Twitter truce in March, 2011, the combative trio locked in battle again at Christmas over custody of their children.

Glaville, 39, tweeted at the time that Cibrian, 38, was “punishing me cuz he lost his job!” — referencing the demise of his short-lived NBC drama The Playboy Club.

Before Sunday’s birthday occasion of Jake, Cibrian and Glanville’s youngest son, the two-time Grammy award winner tweeted about her and her husband’s forthcoming one-year anniversary milestone. She wrote:

“I cannot believe a week from today Eddie and I will celebrate our one year anniversary. Big plans, full two week long celebration. Go big or go home is my way of thinking :) and we have so much to be thankful for. It’s nice to reflect on the joy and the obstacles you’ve overcome together, especially in your first year of marriage. We’re solid and passing with flying colors thus far :) :) I’m excited….if you can’t tell!”

Cibrian filed for divorce from Glanville – his wife of eight years – in August, 2009, the same month he took his romance with Rimes public.