Inspired by the video "Famous People reacting to Demi Lovato by Matthew S, this is a compilation of the reactions of some celebrities to listen Christina Aguilera.
Katy Perry, Justin Bieber, Jennifer Lopez, Bruno Mars and many other famous people reacting to Lady Gaga. Many reactions are very good!!!
she's a legend and sometimes legends don't know how amazing their vocals are :)
Celine Dion, Mariah Carey, Oprah Winfrey and other Famous People Reacting to Charice Pempengco!!!!
James Corden takes full advantage of Christina Aguilera helping him get to work by asking for a little vocal and diva coaching from Christina, and Mel...