Following the show, Spears took to social media to explain her absence.
"I wish I could have been at the People's Choice Awards tonight but I started to feel sick," she shared in a note written on her iPhone. "Thank you so much for voting for me for Favorite Social Media Celebrity! This is dedicated to my fans, the Britney Army – without you this would not be possible."
"I love that I can share my world with you and that you are so supportive of me," the post continued. "Remember to be kind online and spread love. #ThankYou!"