That some have suggested he can't sell tickets to the Glastonbury music festival as fast as some rock acts?

Or that Gwyneth Paltrow has stepped into the fray to defend him against the haters?

"He's the best rapper of all-time and I think he'll knock it out of the park," Paltrow reportedly told the BBC about the rapper's headlining slot at the legendary festival. 

Frankly, it's probably this sort of sweet, supportive loyalty that got Paltrow an invite to the supersecret Jay-Z-Beyoncé nuptials.

Still, you just know all the other rappers are going to make fun of him for it.