It looks like even Hollywood exes can put hard feelings aside. In light of her father’s sudden death, Cameron Diaz received some unanticipated support from two people you wouldn’t expect. Justin Timberlake and John Mayer both attended a memorial service for her late father Sunday held by her family.

Emilio Diaz, 58, died of pneumonia Tuesday morning. On Wednesday, Cameron, 35, thanked everyone for their condolences in a message that read: “His humor and spirit will always live on in our hearts.” And in keeping with that vivacious Diaz family spirit, guests arrived at the memorial service at Mahe in Seal Beach in non-traditional attire. “Most people started arriving at 1:30 and hardly no one wore black,” says a source.”Lots of people were wearing Hawaiian shirts. It looked more like a party.”

Timberlake and Mayer arrived separately and stayed until most people started leaving around 4 p.m., right after Cameron had spoken a few words to the group. I hope their presence made her feel a little better during this mournful time…feel better soon, Cameron!