Taylor Swift and Carrie Underwood (pictured above is her appearance on the list back in 2007) have both made People magazine's annual World's Most Beautiful list again. They're featured in the A-list "What Makes You Feel Beautiful?" section, along with the likes of Angelina Jolie, Jennifer Aniston, Bradley Cooper and Robert Pattinson.  Julia Roberts takes her fourth turn on the cover of People's Most Beautiful issue, on stands Friday.