The chart-topping singer was out to support The GC’s other half as he performed at former TOWIE regular Elliot Wright’s restaurant in Spain.
Jessie introduced Arg to the stage, telling the crowd: “I’m from Essex, this is so fun.
“I have a show here tomorrow and I’ve brought out all my crew and my band, but I want to introduce someone right now that is the sweetest guy.
“I’ve just met him, come on, do a slow motion walk!”
In a video posted on the restaurant’s Instagram page, she added: “It’s the most exciting and the scariest thing to do, so I want you guys to show your appreciation for the hard work, the dedication and the passion that this man has, to sing in front of you guys. Ladies and gentlemen, I introduce to you, Arg.”
After the pair then hugged, he said: “Thank you so much, what an honour!”
Another video saw Jessie, along with Elliot and the rest of the large party, waving napkins around as Arg crooned to Dean Martin’s That’s Amore.
Jessie was also seen joining a conga line – although there was no sign her her Hollywood star boyfriend Channing Tatum.
Now that’s a TOWIE cameo we need to see.