Coparenting at its finest! Ne-Yo and his ex-fiancée, Monyetta Shaw, threw a joint birthday party for their 5-year-old kids, Madilyn and Mason, at Stars and Strikes bowling center in Atlanta on Saturday, November 5, the former couple exclusively tells Us Weekly.

The "Coming With You" singer, 37, and the Atlanta Exes alum, 36, celebrated with family members and close friends including Keshia Knight Pulliam, Kandi Burruss and Phaedra Parks, while Madilyn and Mason enjoyed private bowling, laser tag and arcade games with their friends from school. (Madilyn turns 6 on November 12, and Mason turned 5 on October 9.)

"The party was a success because our kids had a great time," Ne-Yo tells Us. "That's what it's all about. No beef, no bad blood, no shade ... we are grown. This is what it looks like when grown-ups act like adults."

During the party, guests snacked on a pizza buffet, salad and breadsticks. The birthday boy and girl each got their own cake; Mason's cookies and cream-flavored cake was Paw Patrol–themed, while Madilyn's strawberry cake was My Little Pony–themed. Guests also enjoyed personalized cookies decorated with cute pictures of Madilyn and Mason.

"Ever since the M's 2nd and 3rd birthday, Ne-Yo and I decided on a joint party for them because of dad's busy schedule and the fact that their birthdays are close," Shaw tells Us. "They actually love it because they are pretty much inseparable and BFFs. So we've made it our little tradition. ... It was important for us to throw their birthday party together, as we have before, to continue to set a positive example for our kids and to let them know that no matter what, they are loved and celebrated."

The Bigger Than Me author continues, "I understand that some exes can't get along or stand to be in the same place with each other, but we have made a conscious decision not to be those people. We understand that respect for one another is important, even if we don't see eye to eye on a situation. We figure it out as adults and ultimately come to a resolve. It is so important to coparent positively because that will determine the mind-set of our kids in the long run. They are the bigger picture. We do it for them."

Ne-Yo and Shaw split and ended their engagement in June 2013. He is now married to model and actress Crystal Renay, with whom he shares 7-month-old son Shaffer.

"The well-being of the kids is our main focus, and our goal is to make sure that we lead by example," Shaw tells Us. "We strive daily to ensure that they know the importance of family, love and positivity."

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