Christina Aguilera, Mark Ronson & Anderson .Paak Sing ‘Genie in a Bottle’ in Instagram Post

Ronson previously worked on Aguilera’s 2006 album ‘Back to Basics,’ co-producing and co-writing songs “Slow Down Baby” and “Without You.” Rumors have been swirling around Christina Aguilera’s studio work for a while. Her absence from the spotlight following 2012’s Lotus has made many…