Dip It Low Christina Milian
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A Complete Timeline Of Beyoncé And Jay Z's Relationship
After performing 'Love On Top,' Beyoncé popped open her sparkly blazer and rubbed her never-seen-before pregnant belly as everyone cheered, and Jay Z watched from the side. The Guinness Book Of World Records said the announcement broke the record for the "most tweets per second recorded for a single event" as 8,868 tweets per second.