Celebrity Engagements - Jason Mraz, Lily Allen, Natalie Portman, and LeAnn Rimes

We know it's officially engagement season -- but this year celebs seem to have gone a little overboard! Just check out all the recent engagements that have happened this holiday season.

Jason Mraz has announced his engagement to girlfriend Tristan Prettyman, reports Us magazine. The 33-year-old singer announced his good news via Twitter on Thursday with a simple, "SHE SAID YES." Tristan also followed up with her own Tweet, saying, "man of my dreams!!! for the rest of my life!!!"

Meanwhile British songstress, Lily Allen, has also announced her engagement to builder and decorator Sam Cooper, reports the Daily Mail. Sam, who has been dating Lily since July 2009, proposed while the two were on a recent holiday in Bali. Says one onlooker, "Lily was telling everyone that she and Sam had just got engaged -- they could not keep the smiles off their faces. It couldn't have been more romantic. The resort is just so peaceful and picturesque."And People.com has all the details on LeAnne Rimes gorgeous 5-carat oval diamond ring. The country singer, who split from her husband last year to be with actor Eddie Cibrian, showed off the ring in photos snapped of the two in Malibu on Monday. The ring also includes single cut pave diamonds and tiny rose cut diamonds set in rose gold fleur-de-lis that are connected to the band. Brent Polacheck, the jeweler who designed the ring, and a childhood friend of Eddie's, said that LeAnne didn't have too much involvement. "Le[Ann]'s participation in the design was solely regarding the Fleur de Lis. She had her heart set on having that incorporated in the ring. Other than that, Eddie and I sat down multiple times and worked on the rest of the details," he tells People.com.

And Black Swan star Natalie Portman is engaged to choreographer Benjamin Millepied, her reps confirmed to People.com last week. The 29-year-old actress is also expecting her first child with Benjamin. "I have always kept my private life private but I will say that I am indescribably happy and feel very grateful to have this experience," Natalie told Entertainment Weekly in a statement.