Rihanna

Rihanna devotees never anticipated the chanteuse would simply roll out of bed in her silken pajamas and head straight down the red carpet, but that she apparently did at the 2014 MTV Movie Awards, lending an entirely new meaning to the term “boudoir dressing”.
Katy Perry

Katy attends the premiere of “The Smurfs” at the Ziegfeld Theater on July 24, 2011 in New York City.