Former First Lady Michelle Obama celebrated her 58th birthday makeup-free, dancing, and ready to eat all the cake. "Here’s to a sweet 58th! Thank you so much for your outpouring of love. Whether you texted, emailed, or posted on social media, every birthday message I received today meant a lot to me," the best-selling author wrote in an Instagram post commemorating her birthday. "I am so grateful to have so many people cheering me on. Looking forward to seeing what this upcoming year has in store." Obama — who shares her birthday with the late, great Betty White — certainly...