Article continues below advertisementPadma Lakshmi is ringing in her birthday in a bikini. The Top Chef alum, 55, celebrated the milestone under the sun and on the beach, showing off her stunning figure in a magenta two-piece in new photos posted via Instagram on Monday, September 1.Article continues below advertisementPadma Lakshmi Stuns in Magenta BikiniSource: MEGAPadma Lakshmi was joined by her dog for the birthday outing. "I'm so grateful for this last year around the sun," she wrote in a lengthy caption.