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The 'Halo' star is about 6 months pregnant but continues with her hectic schedule.
The star was spotted entering her offices in Manhattan wearing a loose-fit top to help disguise her baby bump.
Earlier this month, the 30-year-old singer revealed that she was planning to design a maternity clothing range after falling pregnant with her and husband Jay-Z's first child.
She's putting together the collection of outfits for mums-to-be as part of her House of Dereon range with her mother Tina Knowles.
"It's been so exciting for me! I love figuring out designs that make me feel edgy and sexy while pregnant," she said.