Richard Lawson is kinda awesome ... he busts up at the notion Cardi B is bigger than his stepdaughter.
We got Beyonce's stepdad in Bev Hills Friday leaving The Palm, and he says it's no contest at Coachella ... Beyonce leaves Cardi B in the dust.
Tina Knowles' hubby doubles down and says Beyonce is bigger than everyone on Earth, but does reserve the #1 spot for someone else in the Universe.
But he cautions Bey had better watch her back ... because Blue Ivy's comin' for her!