Amy Robach was one of the many celebrities who shared photos from their Memorial Day activities – and it's safe to say she made the most of the good weather.MORE: Amy Robach celebrates Memorial Day with friends - but there's one thing she's missingThe Good Morning America star took to Instagram on Monday to post a gorgeous picture of herself with her friends all lined up in the water.Amy looked stylish in a vibrant bikini, with her hair scraped back in a bun, and a pair of oversized sunglasses