Video: Blue Ivy surprises Beyonce at Grammys rehearsal Mon-10-Mar-14 10:32 Blue Ivy surprises Beyonce at her Grammys Rehearsal!Beyonce and Jay Z's performance of 'Drunk In Love' took the Grammys by storm! Now a video with Blue Ivy surprising her mama has surfaced. Queen Bey can be seen practicing with a Jay Z stand in when a little wee voice can be heard singing along. Realizing it is Blue Ivy, Beyonce's fierce face softens and she says “Hi Blue Blue” with Blue responding from backstage.Watch the video of Beyonce's Grammys rehearsal featuring Blue Ivy above. Share this Become a fan of Mai on Facebook and on Twitter .