A Toys R Us spokesperson tells us this doll is a runaway hit this holiday season. And price-tracking site Free Price Alerts informs us that this is its hottest toy right now, based on product views and purchases over the last week.
Based on the Disney show of the same name, the Doc McStuffins doll comes with a stethoscope and other diagnostic tools that can be used to give Lambie (a tiny lamb, which is included) a check-up. Using the stethoscope allows you to hear Lambie's heartbeat, and for some reason, Lambie giggles when the good doctor takes her temperature. It's intended for ages 3-5, and sells for $34.99.
It's currently unavailable on ToysRUs.com, though, and has limited availability in stores. If you're really desperate, it can be had at a huge markup.