The former Spice Girl was pictured at the studios earlier today (16 October) and was sporting a very fetching purple and grey zebra-print onesie.
Mel even had a manicure to match. What a girl!
Last weekend, Mel debuted a sleek new bobbed hair 'do as this year's contestants took to the stage for the first time, and she was wearing it down again today in all it's glory.
Mel is mentoring the boys' category - consisting of Paul Akister, Andrea Faustini, Jake Quickenden and Jack Walton - and they have all sailed through to the next live show.
The judge clearly has faith in her lads, given her seriously laid-back look!
But behind the scenes, Mel is apparently keeping a watchful eye on Paul, Andrea, Jake and Jack.
Chatting to Reveal, Jake admitted that Mel Skypes them to make sure they are behaving!
This week is 80s-themed and we can't wait to find out what the hopefuls will be singing. Having lost Blonde Electra and Overload Generation to the public vote, there are now 16 acts left in the competition.