Karrueche Tran vs. Rihanna pregnant RUMORS: Drake & Chris Brown girlfriends both fall victim to viral 'baby bump' hoax, why?

Rihanna and Karrueche Tran are rumored "frenemies" - but the two lovely ladies actually have a lot in common!

For one thing, Chris Brown.

Another - both starlets constantly fall victim to crazy pregnancy rumors.

For example...

Rihanna pregnant, Drake vs. Chris Brown baby bump? RiRi 'gives up' smoking weed, partying, drinking [PHOTOS]

Karrueche Tran vs. Rihanna, pregnancy battle? Model girlfriend wants Chris Brown baby, RiRi's 'lover' Drake knocks-up Jhene Aiko during steamy affair?

Rihanna Sad? 'I Want Kids, But I Have No Potential Baby Daddy!' RiRi Jealous of Karrueche Tran?

Karrueche Tran pregnant!? Did Chris Brown's girlfriend really share 'baby bump' news on Twitter/Instagram, what must RiRi think?

Rihanna Pregnant with Chris Brown's Baby? Rumors Swirl, RiRi's Mom 'Furious,' Controversial Couple Ready for a Kid? [POLL]

Karrueche Tran Pregnant with Chris Brown's Baby? Model will do anything to get Ex Back, Rihanna 'Tired' of Rumors

Rihanna AND Karrueche Tran Want to Get Pregnant by Chris Brown? Rumors Swirl as RiRi Parties with Fans on 777 Tour Private Jet

Some crazy [viral] stuff! But why do these insane rumors keep on happening? Neither RiRi or Tran have ever shown signs of the slightest "growing baby bump" - and all four individuals (Rihanna, Tran, Drizzy, and Breezy) are too busy with their careers and personal issues right now to even think about kids.

So what's with all of the hype? Why do Mstars fans think so many people like spreading these pregnancy lies? Share your thoughts in the comments section below!