Star kids: Beyonce's Blue Ivy sings, Mariah's twin delights

Beyonce shared a series of touching snaps of daughter Blue Ivy helping her prepare for her concert. (Instagram)

Beyonce also shared a close up of Blue Ivy's little fist as she clutches her very own microphone, adorned with Dora The Explorer stickers. (Instagram)

A second picture shows the Halo hitmaker striding across a staging area. (Instagram)

Mariah Carey and her son Moroccan, who appeared thrilled with his trip to the Bronx Zoo. (Instagram)

Mariah smiled as daughter Monroe tried out a giant pair of animal ears. (Instagram)

Mariah Carey has treated her children to a day at the zoo. (Instagram)

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