And while last week she rocked a lavender hue and punk-inspired braids, this week she's gone back to her platinum blonde roots – but taken it to a whole new level with a short, sharp, asymmetric bob.
Christina worked her latest look on the results show of The Voice which aired on Tuesday evening (17 May) in the States.
She then posted a close-up of her hair and make-up on Instagram the following day – and while she coupled her snap with a haircut emoji, we're not laying any bets on this being anything other than a very convincing wig.
But you never know when celebrities and their endless hair makeovers are involved...
Christina's latest do came courtesy of celebrity hair guru Chris Appleton, who also styles the likes of Rita Ora and Jennifer Lopez.
Sleek, chic and parted over to one side this is one super-blunt bob, that's for sure. And with her strong eye make-up and oversized blazer she cuts a very strong figure in this 'don't mess with me' look!
"To get this look I used hairspray while straightening Christina's hair," Chris wrote on Xtina's website."This gives a very blunt finish and adds a more dramatic look."
"To compliment the look and open the face, push one side behind the ear. Finish with a good gloss spray," he added. We love Lee Stafford Shine Head Spray, £5.99, boots.com which adds just the right amount of shine without making your hair look greasy.
Ps: We predict straight, ironed hair is about to make a major return, so sharpen your ironing skills ladies and embrace those straighteners again. Fancy a new pair? Then ghds are the only way to go. Check out the new limited edition azores collection, from £130, ghd.com.
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