To be honest, we can barely keep up with the 'I Will Never Let You Down' singer's ever-changing barnet, but a 24-hour hair colour is swift work, even for her.
"True Blue for Abu Dhabi," Rita Instagrammed on Saturday (22 November), along with a couple of snaps of her temporary, pastel-toned locks with darker, dip-dyed ends.
Rita was in Abu Dhabi to perform at Beats on the Beach during the final Formula 1 race of the season.
She also made a special appearance at the new Adidas store where she bumped into some of her avid fans.
As we're sure you'll know, this is not the first time our Rita has dabbled with blue hair...
Not only did she go for a full-on electric blue hue back in May, 2013, but we also saw her dabble with blue, dip-dyed ends a couple of months later.
More recently she tried out blue and purple, ombre locks at the Michalsky StyleNite during Mercedes-Benz Fashion Week in Berlin, Germany.
But this is probably our favourite blue so far (expertly coloured by one of Rita's favourite celebrity hair gurus, Christopher Appleton fyi).
It also has to be the quickest hair change we've ever seen, as not only was it blonde just one day before, but it was back to being blonde again at the American Music Awards in Los Angeles on Sunday night (23 November)!
Blue hair for one night only? Well, if anyone can get away with it, Rita can.
Much hair respect to that girl!
What's your favourite Rita hair colour and why? Let us know below. Our fave comment across the site each week wins £50!
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