Celebrity Twitter Chatter: John Mayer, Anna Kendrick, Jessica Biel and More

Perry and Mayer in NYC
Katy and John dress down as they leave his apartment.
We’ve rounded up some of the best and most insightful celebrity tweets from the past 24 hours.

John Mayer talks fashion, Anna Kendrick knows how to hold a grudge, Jessica Biel talks underwear, may be launching a line of wines, plus more fascinating celeb twitter posts and words of wisdom below.