When X Factor auditionees have their heart set on impressing a particular judge, it's heartbreaking for them if their idol has taken the day off.
But while there was a lot of disappointment when the crew told arriving contestants that Nicole Scherzinger wouldn't be hearing them sing, sadness quickly turned to excitement when they discovered former judge and ex-Spice Girl Mel B would be sitting in for her.
Viewers were so pleased to see her back that some even had art tributes for her.
Sharp-tongued Mel certainly isn't known for mincing her words, so unfortunately wannabes couldn't expect the same friendly supportiveness that Nicole usually offers.
On the plus side though, you know that if you've impressed Mel, it's been a good day at the office.
Returning contestant Gifty Louise managed to bring a smile to Mel's face, and viewers were just as pleased to see her again.