Why does Bradley Cooper look SO different at recent red carpet appearances?

Bradley Cooper's taut visage at recent red carpet appearances have raised questions about whether the Oscar-winning actor has undergone cosmetic procedures to alter his look.Dr. Rian Maercks, the founder of The Maercks Institute, recently told the Daily Mail he believes the Academy Award-nominated actor may have undergone a procedure to tighten the neck or the lateral borders of the face to achieve a more youthful look.However, the expert said that because the procedure doesn't target the central face, it has changed Cooper's overall look.