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: JessieJ.lnk.to/WhoYouAre​​ ►Subscribe to Jessie J on YouTube: JessieJ.lnk.to/Subscribe​​​ ►Follow Jessie J online: Ifacebook.com/jessiej​​​ instagram.com/jessiej​​​ twitter.com/jessiej​​​ tiktok.com/@jessiej​ jessiejofficial.com​​​ #JessieJ​​​ #WhoYouAre​​ #MammaKnowsBest