Last week Beyonce posted footage of her Grammy rehearsal to Instagram. In the inta-video, Beyonce practices her epic Grammy-opening, “Drunk In Love” performance. During the performance, Blue Ivy, who watched from above, sings into the auditorium’s loud speaker, “Surfboard, surfboard”. Beyonce, who melts at the sound of her baby singing along with her, says hello to Blue who replies with a “Hi mommy!” It’s the cutest thing ever! Blue is getting big quick! Before we know it, the two-year old is going to be debuting a music video of her own! Check out the exclusive footage below!