Christina Aguilera is keeping things close to the vest when it comes to confirming her pregnancy (despite a nudge from Paris Hilton), but she's playing fast and loose with the bundle of joy news with the rest of her wardrobe.

On Saturday, the singer was positively glowing (from either hormones or her glittery layer of makeup) as she stepped out in a bun-in-the-oven-outlining tank top to select items for her baby registry at a Los Angeles boutique.

Christina shops for her baby in Los Angeles on Oct. 6. (X17Online.com)

People reports Xtina, along with hubby Jordan Bratman, her mother-in-law, sister-in-law and young niece, spent two hours browsing the luxe offerings at Bel Bambini, picking out everything from blankets to diaper bags to clothes.

"She looked beautiful," a store staffer raves to the mag. "She had a little bump. She said she was so excited [to have a baby]."

So excited, it seems, that the peroxide-passionate chanteuse even told employees what she was having, although she requested that they keep their lips sealed (yeah, good luck with that).

Aguilera smartly crossed gender lines as she shopped, with paparazzi snapping her eyeballing both a pink and a blue Bugaboo stroller (retail price: about $900).

The sweetest shot of the day came as the doting Bratman stood behind his spouse and gently placed his hands on her growing belly as she placed her hands over his.

"They registered for all the accessories," says Smith. "They were both picking out things together."

The fame-mismatched lovebirds, who will celebrate their second wedding anniversary next month, left the store arm-in-arm, with Christina casually toting her niece on her hip.

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