While we're not sure if those basketball players were just pulling our leg or not, rapper B.o.B seems pretty adamant the Earth is flat. At the start of 2016, he tweeted a string of bizarre comments supporting the idea.
"A lot of people are turned off by the phrase ‘flat earth’ ... but there’s no way u can see all the evidence and not know... grow up," he said.
"No matter how high in elevation you are... the horizon is always eye level ... sorry cadets... I didn’t wanna believe it either.”
This led to a now rather infamous "rap battle" with astrophysicist Neil deGrasse Tyson, who took it upon himself to debunk most of B.o.B's musings.
Yes, B.o.B could have been joking too. But a cursory glance at his Twitter feed suggests that's probably not the case.
Just a few days ago, for example, he sent this bizarre tweet: "now realize that there is no earth... there is only now." Yep.
He shot to the fore again in September, when he was apparently seeking money for a crowdfunding campaign to send a satellite into orbit and test if Earth was flat.
That looks like it might have been fake, however, so perhaps B.o.B will never get the answers he's seeking.
I'm not 100 percent clear on who Tila Tequila is, let alone how she became famous. I hear it has something to do with Myspace, but hey, apparently she's a celebrity.
And last year, she made headlines (again?) when she repeatedly tweeted that she thought Earth was flat, and wanted someone to tweet her evidence it wasn't.
"I WILL STOP MY #FLATEARTH TALK IF SOMEONE CAN SEND ME A GOD DAMN PHOTO OF THE HORIZON WITH A CURVATURE!" she eloquently wrote. Lovely.
She also queried why buildings in New York would stand straight up, rather than tilt, if Earth was round. Please don't make me explain why this isn't the case.
Aside from thinking Earth is flat, the Trump supporter also appears to have some questionable views in favor of Hitler, and has been pictured making a Nazi salute at a far-right rally. How nice.