The cute couple were pictured looking loved-up outside the Andreas Hotel on Thursday afternoon (27 February), laughing and joking with one another and holding hands in their colourful outfits.
R&B songstress Christina, 32, appeared to be ready for summer in her pretty yellow minidress, which she wore with a light denim jacket.
She also left her make-up simple and fresh and accessorised with plenty of jewellery, including gold hoops and lots of rings.
The most important ring she was sporting though, was on her left hand and could be spotted from a mile away with all of that sparkle!
However, we couldn't help noticing that this piece of bling is different to the engagement ring Christina was flaunting last year in her photos.
Back in September, the 'Dip It Low' star was spotted wearing a massive ring on the red carpet (and on Instagram!), which fuelled speculation that Jas had proposed.
These rumours were later confirmed by multiple reports and Christina rocked her impressive bling at various other showbiz events.
However, it now looks like she has swapped the previous ring for a chunky new one covered in diamonds.
Either way, they're both pretty fabulous!
Contrasting with his pop star fiancée, Jas wore a purple tie-dye style of shirt yesterday and a pair of plum coloured trousers.
Christina was previously married to music producer The Dream (real name Terius Nash). They have a daughter called Violet.
What do you think of Christina's summery outfit? Let us know below, as the best comment from across the website each week wins £50!
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