Fresh off of her BIG engagement news, Britney Spears made the short trip from Los Angeles, CA to Las Vegas, NV to celebrate with her loved ones on Friday evening (December 16).
The "Hold It Against Me" singer and fiance Jason Trawick touched down in Sin City on a private jet before loading into a chauffeured ride and heading over to Planet Hollywood - where the couple was greeted with an array of balloons lining the hotel club's VIP entrance.
After changing into fancier attire, Miss Spears and her hubby-to-be joined family members for a ring unveiling soiree - at which Britney proudly showed off her 3-plus carat round stone ring surrounded by pave-set diamonds, which was designed by Neil Lane.
With the Vegas trip help to toast the couple upon their engagement, the group also happened to be celebrating Trawick's 40th birthday - as the night also included a stop at Chocolate Lounge in the Paris Hotel along with a visit to Chateau nightclub.
As previously reported by GossipCenter, Britney happily announced her engagement to Jason earlier in the day, as she joyously tweeted, "OMG. Last night Jason surprised me with the one gift I've been waiting for. Can't wait to show you! SO SO SO excited!!!! Xxo"
The pop star added a few hours later, "Still glowing! About to jump on a plane to Planet Hollywood in Vegas. Throwing a Bday Party for Jason at Chateau Night Club. So fun. Xxoo"