The pair proved the most popular on a night that saw the judges award only one red star between the six contestants.
Mini Moves - a group of ten and eleven-year-olds from Glasgow - were described as 'fearless' and 'unforgettable' by Aston Merrygold after their energetic routine.
Kimberly Wyatt said their star power was undeniable, while Diversity frontman Ashley Banjo also offered them high praise: "What I love about you is that you use your strengths to create a style that's your own. I've never seen anyone like you in four series of this show."
Later, 14-year-old Rhys - who played the title role in the West End production of Billy Elliott - was told he'd 'seriously raised the bar'.
"Your technique is exquisite, your turns, leaps, everything is pitch perfect. You can tell you love to dance. It's so honest to you," complimented Kimberly.
"Hard work will beat talent every time if the talent doesn't work hard. But when talented people work hard, it produces people like you," added Ashley. "Every line, every shape, every turn, you executed everything so effortlessly. That's the sign of a special talent, and at 14 years old? Unbelievable."
Elsewhere, tap-street fusion dancers The Pulse Collective - led by series one semi-finalist Kane Ricca - split the panel with their closing performance, despite eventually recieving three gold stars.
"There were parts of that I loved, there were others that weren't hitting home," Aston mused. "When you dance as that full force, it's so powerful, but when you're splitting up to little tiny groups, you're breaking down what is an army of tap."
"When your tap is way beyond your street, for me it shows, and I find it really difficult to say whether you should go through to the final or not," commented Ashley. "I'd need you to sort out the identity and come hard like you did in your audition."
Rhys and Mini Moves join Lukas McFarlane and Tom Hughes-Lloyd in the line-up for the final, which is scheduled for March 17th.
Got To Dance continues next Sunday at 6.00pm on Sky1 (HD), when G-Nome, Hashtap, IMD, Poison, Rory and Wild G will compete for the next two places.