[Photos] Ariana Grande Performs on Today Show + Kylie & Kendal Jenner Celebrate DuJour Cover

Ariana Grande in Concert on NBC's "Today Show" at Rockefeller Center in New York City - August 29, 2014

Ariana Grande in Concert on NBC's "Today Show" at Rockefeller Center in New York City - August 29, 2014

Ariana Grande in Concert on NBC's "Today Show" at Rockefeller Center in New York City - August 29, 2014

Ariana Grande in Concert on NBC's "Today Show" at Rockefeller Center in New York City - August 29, 2014

DuJour Magazine's Jason Binn Celebrates Kendall And Kylie Jenner's Fall 2014 Magazine Cover - Arrivals

Kendall Jenner, 18, and Kylie Jenner, 17, recently posed for the Fall issue of DuJour magazine, shot by photographer Bruce Weber. This week, the Keeping Up With the Kardashians stars attended the cover party in NYC, at Lavo. See the photos.