The R&B songstress stepped out in an elegant, floor length white gown by Sen Couture for the ALMA awards in California over the weekend, which featured a cut-out design at the back and flattered her petite figure perfectly.
She styled her long brown locks into a classic up 'do and accessorised with a pair of gorgeous diamond earrings by JN Jewels, a Jimmy Choo clutch bag and her rumoured engagement ring.
But with her stint on Dancing With The Stars in full flow, Christina was soon seen switching up her style again and opted for a completely different look to the one she had just rocked on the ALMA red carpet.
On Monday (30 September), the 32-year-old upped the sex factor with a risqué little number inspired by old Hollywood glamour and the flapper girl era.
She donned a lingerie-esque cream bustier, sheer tights and lace gloves for her performance of the Charleston with professional dance partner Mark Ballas.
The 'Dip It Low' pop star also swapped her long hair extensions for a super short red wig and added a little feather to her 'do.
She and Mark breezed through their DWTS performance and are now safely through to the next week of the competition. We wonder whether her great sense of style played a part in that too?
Perhaps, Christina's confidence on the show was also down to daughter Violet supporting her in rehearsals.
On Sunday (29 September), Christina wrote on her Facebook page: "Brought my munchkin with me to rehearsals for Dancing With The Stars the other day! She's such a light to my life! She had a great time watching Mark Ballas and me dancing.."
And speaking of three-year-old Violet - whose father is music producer The Dream - she's been having a great time lately playing with Christina's new birthday presents: two little chicks!
Last week, Christina received the chicks as a gift on her 33rd birthday and couldn't wait to share them with her daughter.
She wrote: "Meet my Birthday Babies!!!! Omg! I got chicks for my B-day!!! This.Is.Awesome!!!!! Thank you @ItsV0n! I wanted these so bad! AND they'll lay eggs by Easter!!! Violet is gonna be in LOVE! Hap---Burt-Day!!!!"
What do you think of Christina's two looks from this week? Which do you prefer? Let us know below, as the best comment each week wins £50!