Blue sings 'surfboard' with Beyoncé Beyonce Mon-10-Mar-14 18:25 Share this Tell Us What You Think WTF 0 LOL 0 FAIL 0 OMG 0 HOT 0 CUTE 0 ] By Steph Monks So cute! A video has come out of Beyoncé rehearsing her 'Drunk In Love' performance for the Grammys. Her and Jay Z's daughter Blue Ivy has a microphone backstage and you can hear her singing 'surfboard' along with her mum. When Beyoncé hears her she says hi to her down the mic, and Blue responds saying "Hi mommy". Adorable! Watch the video here. You May Also Like 15 top celebrity Instagram moments of 2014 3 New York Grandma’s outraged by Beyonce’s Lyrics 6 bizarre celeb baby names and the meaning behind them 6 interesting facts about this year's biggest songs Become a fan of The Edge on Facebook and on Twitter .