Post Malone Helps Fans Pull Off Gender Reveal at Concert

Post Malone‘s up for any huge task during his shows, even those outside of music — like, revealing the gender of his fans’ baby while up onstage!!!

The rapper got to answer that very important question after his concert in Tulsa … while greetin’ some fans and signing autographs Friday night, an envelope was stuck to one poster — which is where Post got the sweet opportunity.

You can hear the excitement in the guy’s voice … and after some well-deserved anticipation, Post’s eyes light up, and he reveals … the fans are having a girl!!

The future dad seemed to be still reeling after the good news … because he was absolutely jumping with joy in an elevator afterward.

Post and his fan have something in common, now — both are girl dads!

TMZ broke the story, PM is expecting his first kid with his GF  … and he subtly announced her birth in June while on Howard Stern‘s show.

BTW, Post seems to be in better spirits and health at his shows — as you know, he fell into a hole during a September gig and injured his rib, and then messed up his ankle at an ATL show this month.