Pakistan, April 26 -- Supermodel Bella Hadid gushes over 'inspiring' elder sister Gigi Hadid, in a heartfelt tribute on the latter's 29th birthday.

Taking to her Instagram handle earlier this week, on April 23, Bella Hadid sent in some birthday love for her sister Gigi Hadid, along with some rare childhood photos of the supermodel sisters.

"Happy birthday princess of Genovia I love you so much," Bella began to write in the caption of the 10-picture gallery.

She continued, "Life without you would be nothing, I would be nothing! You inspire me and make me feel strong. Watching you give birth and then raise the most perfect angel is the most magical gift a sister could ask for. I feel so lucky. You are the best &coolest mama, best sister,...