The Barcelona winger turned 25 on Sunday and enjoyed a midweek shindig with his closest pals, family and his girlfriend, Bruna Marquezine.
Neymar shared a Batman-themed cake with those attending, as he took to the stage to perform a series of karaoke songs.
Barcelona’s stars were granted a midweek rest day after securing their place in the Copa del Rey final with an aggregate victory over Atletico Madrid on Tuesday night.
They will now prepare to take on Deportivo Alaves in the end-of-season showpiece.
The Barcelona stars gathered at the exclusive Restaurante-Lounge IVY – which is normally closed on a Wednesday.
Neymar kept his social media followers in the loop from the evening, posting clips of his karaoke cameos onto his Instagram story.
It was a late event and the birthday boy himself did not arrive until gone 10pm.
His Barca team-mates, including Messi, Andres Iniesta and Gerard Pique, turned up slightly earlier in the evening.
Neymar has fast become one of world football’s most recognisable names and was the post boy of the Brazil World Cup in 2014.
He has already earned 75 caps for his country, with a two-in-three scoring ratio.