The YouTube video that really changed my life. Mamma knows Best. A duet with my younger self. 12 years apart. Listen & download "Mama Knows Best" here: http://JessieJ.lnk.to/WhoYouAre​​ ►Subscribe to Jessie J on YouTube: https://JessieJ.lnk.to/Subscribe​​​ ►Follow Jessie J online: Ihttps://www.facebook.com/jessiej​​​ https://www.instagram.com/jessiej/​​​ https://twitter.com/jessiej​​​ https://www.tiktok.com/@jessiej​ http://www.jessiejofficial.com/​​​ #JessieJ​​​ #WhoYouAre​​ #MammaKnowsBest