Beyonce was the talk of the Grammy Awards this year with her sultry performance alongside hubby Jay Z. Now, the singer's uber fans (a.k.a. The Bey Hive), have unearthed rare footage of her rehearsals for 'Drunk in Love' featuring a Hov stand-in and the voice of daughter Blue Ivy.

In the video, the songstress is seen rehearsing with a man who looks an awful lot like Jay Z. "Surfing all in this good-good," she sings while leaning on the shoulder of the New York Yankees cap-wearing dude. During her set, Blue's cute voice is heard singing along with her mom -- she's obviously mic'd up too. "Surfboard," she echoes.

"Hi, Blue Blue," Beyonce beams to her daughter, who's off-camera.

"Hi, Mommy," Blue responds. The superstar can't contain herself and makes an adorable face when hearing her daughter speak.

Blue Ivy recently celebrated her 2nd birthday. Mama Bey gave her little princess a Cadillac and Ferrari for the big day.

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