Britney Spears Engaged to Jason Trawick: Report

Britney Spears smiles for the camera with boyfriend and former manager Jason Trawick.

Britney Spears is reportedly ready to walk down the aisle for a third time: the pop star is engaged to her longtime boyfriend Jason Trawick.

According to Us Weekly, Trawick popped the question on Thursday night (Dec. 15) during a romantic dinner with Spears. Although Spears has not officially announced the engagement, she posted on Twitter Friday morning, "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."

Trawick first met Spears in 2006 while serving as her agent at William Morris Endeavor Entertainment. The pop superstar previously wed childhood friend Jason Alexander in 2004 -- a marriage that has annulled within 55 hours -- and was later married to Kevin Federline for two years. Spears and Trawick officially confirmed that they were a couple in mid-2010.

The engagement caps off a huge year for Spears, which included the release of another Billboard 200-topping album, "Femme Fatale," collaborations with Rihanna, Nicki Minaj and Ke$ha, and an international arena tour. On Thursday, Spears was voted the 2011 MVP of the Year by Billboard.com readers.

Thursday also doubled as Trawick's 40th birthday, and Spears posted on Twitter that she bought him a new "Confederate Bike" for the occasion. "He looked so cool in the video, that I had to get him a new motorcycle," Spears wrote, referencing Trawick's cameo in her "Criminal" video.