Britney’s younger sister Jamie Lynn tweeted about Britney Day today!

Check out the ADORABLE tweet below:

Been celebrating Britney day since day one.. Happy #BritneyDay! pic.twitter.com/zhG52LHQPx

— Jamie Lynn Spears (@jamielynnspears) November 5, 2015

Talk about CUTENESS overload!

Britney also tweeted about Britney Day today as well:

#HappyBritneyDay to ALL the Britney’s out there!! ? https://t.co/oKTiVrhJHN

— Britney Spears (@britneyspears) November 5, 2015