Ciara shows off her new engagement ring at The Hotel Derek for Moet Rose Lounge Houston Hosted By Ciara on October 28, 2013 in Houston, Texas. Credit: Bob Levey/Getty Images for Moet & Chandon

All eyes on the birthday girl's bling!

Ciara bared some skin in a sexy, see-through dress to fete her 28th birthday at the Moet Rose Lounge Houston in Texas on Monday, Oct. 28, but most guests were focused on the newly-engaged singer's sparkling ring.

The "First Lady of Crunk & B" (whose actual big day was Oct. 25) received a surprise proposal from her rapper-producer boyfriend Future, 29, in NYC over the weekend, her rep confirmed to Us Weekly. Ciara flaunted her stunning 15-carat Avianne & Co. diamond ring following what she described to her 5 million plus Twitter followers as "One Of The Sweetest Days Of My Life!" Although Future (his actual name is Nayvadius D. Wilburn) was not present in Houston for the event, the birthday beauty glowed with happiness as she celebrated the occasion.

The beaming talent, clad in a racy, black, cutout gown by Alon Livne that exposed her entire right leg with a mega-slit running from her waist to the floor, shared several shots from the party on Instagram. In one image, she wraps her left hand around the neck of a special-edition birthday bottle from Moet & Chandon-- the "1, 2 Step" hitmaker's bling, beautiful and unavoidable. " #MemorableNight #MoetRoseLounge My @MoetNectarRose Birthday bottle is 1 of 1!" she wrote. 

The marriage will be the first for both. The couple, who recently collaborated on Ciara's latest album, confirmed their relationship in early 2013.