Chris Martin Best Single Dad Ever ... Throws Coldplay Bday Bash for Son

4/6/2016 7:25 AM PDT

Chris Martin's Birthday Surprise for Moses, Brings Him Onstage in Peru

More proof no one does divorce as well as Gwyneth Paltrow and Chris Martin -- she kicked it backstage at his concert in Peru ... all to celebrate their son's 10th birthday together.

Gwyneth posted video of Chris surprising Moses by bringing him onstage during a Coldplay concert in Lima on Tuesday night. She captioned the vid, "When your dad wishes you an early 10th birthday at work...#coldplaylima" 

TMZ broke the story ... the exes just finalized their divorce settlement, and it's the most civil uncoupling ever.

Chris also invited Apple and some friends onstage as the crowd sang "Feliz Cumpleanos" for Moses. Meanwhile, Gwyneth "consciously" shunned the spotlight.