In a Saturday Instagram post, the Bang Bang singer, whose real name is Jessica Cornish, announced she would be having a baby boy. The post occurred just hours before she flaunted her pregnancy on the red carpet of the BRIT Awards 2023. “Since I wrote this song every time I play it or sing it he moves like crazy… so I think this song is the one. Oh yeah… I’m having a boy.” “And I promise I am wearing underwear.” The video showed the singer in a white robe rubbing her baby bump while singing…