Beyoncé Surprise Drop and Yankee Stadium Appearance

Beyoncé surprise released 'Morning Dew (Donk)' for B'Day 20th anniversary with Pharrell and The-Dream, lyric video using 2007 SI footage; B'Day reissue coming Sept 4. She subbed for Jay-Z at Yankee Stadium, joined Rihanna for 'Run This Town'. Jay-Z adds extra LA and London dates to his anniversary tour; Beyoncé speculated as guest on her birthday. Ongoing buzz and potential tour implications.