Many Believe These Pics Prove Rihanna Is Pregnant!

Rihanna's annual Diamond Ball was last night and the event attracted way more than it's normal star studded attendees, it also attracted rumors that Rihanna is PREGNANT! In addition to the pics and videos, MTO claims that RihRih stayed sober all night! The video below is of her grabbing a glass of wine, but not really taking a sip! Do you think this is enough evidence to prove Rihanna is pregnant?