James Devaney/GC ImagesAlicia Keys celebrated her 41st birthday Tuesday by announcing a new health and wellness partnership with the Athleta company. "I was drawn to Athleta because we both want to encourage women to discover, accept and OWN their power," the "Empire State of Mind" singer said in a statement. "We're all about the uniqueness of women, body positivity and creating a lifestyle that showcases our immeasurable power within," she added. "It's time to thrive - not just to survive - and my hope is that these offerings are another outlet for you to amplify your personal power, your possibility, and feel comfortable in your own skin." The 15-time Grammy winner will co-create different product offerings for the brand and will also join Athleta's Power of She Fund grant program as a mentor and advisor. The program supports businesses and organizations that are committed to making well-being accessible, specifically for wome