The former Wanted boyband member, 25, danced to 'See the Day' by Dee C Lee and scored an impressive 31... The highest score of the series so far.
Newark-born Jay took to the floor on Saturday (3 October) night and showed off his newly-cut hair - which we LOVE!
In a pre-recorded film, we saw the nevous-looking singer get seven inches cut off his mane by a hairdresser.
Echoing the sentiments of many fans, one watcher tweeted said: "JAY HAS FINALLY CUT HIS HAIR I AM SO HAPPY."
After performing a graceful waltz with professional partner Aliona Vilani, head judge Len Goodman gushed: "As you moved across the floor I thought - Jay's fluid. Let me just say I've done this for a long time and it takes a lot to get me excited... you got me excited."
Bruno Tonioli enthused: "Jay I love the way you turn. It was great. Footwork, frame, flow - Jay you're here to stay."
Craig Revel-Horwood said: "Your thumb was sticking up... all the rest of it was very well danced."
As The Wanted's Tom Parker watched from the audience, Darcey Bussell said she'd been "blown away" by Jay's performance. She said: "There were lovely bits of romantic quality. The intensity you had on Aliona was fantastic."
Before the live show, Jay tweeted his 892,000 followers with the message: "I was 100% convinced I knew how to waltz before this week, @AlionaVilani, that was tough. But SO fun - thanks a mil, now lets have a go."
He added: "Tonight is all about elegance - gonna channel my inner Billy Elliot from days of yore."
Peter Andre and Janette Manrara also scored highly, coming second with 30 points, while Helen George and Aljaž Skorjanec scored 29.
Iwan Thomas and Ola Jordan came bottom of the leaderboard after dancing the cha-cha to 'Sexy and I Know It' by LMFAO.
The first of the 15 contestants will be eliminated on Sunday evening (4 October) during the results show on BBC One at 7.15pm.
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