Travis is a good player who's earned some recognition. Honestly, I'd forgotten about him marrying a Kardashian until I read the story.
But world's most famous? I'm guessing the OP's tongue is firmly planted in cheek.
Nevermind asking a drummer to list a dozen famous drummers, I'm sure Travis would not be anywhere on that list and certainly not close to the top of it. But ask someone on the street, and people of most ages would be more likely to name Tommy Lee, Ringo, Buddy Rich, probably Charlie Watts, maybe even Alex Van Halen. But the idea that Travis Barker is anywhere near "world's most famous" really burns me up... irony/pun intended!