Here's the insanely rich WhatsApp co-founder Jan Koum posing with his gorgeous girlfriend in Spain earlier this week (left)... and the Facebook baller who purchased the app from him -- Mark Zuckerberg with his beautiful wife (right).
The billion dollar question is...
WhatsApp Babe vs. Facebook Babe
WHO'D YOU RATHER?
2/26/2014 12:10 AM PST BY TMZ STAFF
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