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Britney Spears and Jason Trawick smooching, a clear shot of the diamond and some cake…could this picture be any better?!

The soon-to-be newlyweds were gracious enough to show the camera some love while celebrating Trawick’s 40th birthday at Planet Hollywood in Las Vegas (and a pretty nice photo op for the ring, too. Even if it’s not that subtle.).

Looking pretty good, don’t you think?

“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,” Britney tweeted on Friday, and soon afterward we found out that they’d also be celebrating their engagement!

So what were the two lovebirds up to as they celebrated the two momentous occasions?

We hear Spears and Trawick were hand-in-hand and kissing throughout the night, as they canoodled at Sugar Factory’s Chocolate Lounge prior to heading to Chateau Nightclub.

The couple and 30 of their closest friends and family members dined on salmon and various pizzas for dinner, along with chocolate pizza, cupcakes, gumdrops and other candies for dessert.

And then it was time to party.

Inside of the hot spot, the “Hold it Against Me” crooner surprised her newly cemented fiancé with a two-tier black and white birthday cake, with “Happy Birthday Jason” displayed on the red-velvet dessert (Trawick’s fave cake flavor).

And post-cake and birthday fanfare, Spears, Trawick and their entourage danced until late in the evening.

“Tonight was one of the most magical nights of my life,” the bride-to-be tweeted early Saturday morning. “Such an amazing time with my new fiancé and our closest friends and family. #Blessed.”

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