Christina Aguilera turned her 40th birthday celebration into quite an event. And rightfully, so. The diva penned a powerful note exemplifying how to deal with stepping into a new decade of your life, especially if you struggle with accepting the concept of ageing. Your best life could be lived at 40’s, as the ‘Beautiful’ singer … “Christina Aguilera Pens Powerful Note On Turning 40, ‘The Best Is Yet To Come’”