Selena Gomez, who as of July 22, 2013 shares her birthday with the royal baby, celebrated turning 21 on Monday by posting a video for her latest single, "BIRTHDAY" on YouTube.
"I wanted to celebrate my 21st Birthday with all of you, so we made this video for us all to celebrate to," the singer wrote on the description. "Thank You for all the love and support you have shown and continue to show me. I love you all so much!!"