The boyband performer joined Ashley Banjo and Pussycat Doll Kimberly Wyatt on the panel this year, and Merrygold claimed that he was in awe of the contestants on the show.
[Aston on Got to Dance]
"I've definitely been inspired by the different forms of dancing. The strength, the core work, the training for someone doing ballet, that's just incredible," Merrygold told DS.
"You can't dance ballet without being in your best physical shape and in the peak of fitness. Jazz dancing as well, it's not just about feet work, great rhythms and movement, it's about getting that personality across.
"You get inspired and get ideas from all over the place when you see this wider array of dance acts on the show."
The X Factor singer said that his personal favourite act from the auditions was Hartlepool group Ruff Diamond, who brought "an old school flavour" and "a new level of gymnastics" to the show.
Ruff Diamond on Got to Dance:
Merrygold admitted that he would be "honoured" if Simon Cowell offered him a job as an X Factor judge, but said that he is perfectly happy on the dance series.
"It is getting better every year. We have 96 cameras - they're the first people to do that on a TV talent show. To be able to see dance moves from 360 degrees is incredible and they're always pushing boundaries and on the cutting edge with this show."
All the judges on Got to Dance take to the stage and perform during the Live Shows and Merrygold promised his fans that JLS would be doing a "very special" performance.
[Got to Dance judges]
"We've got something very, very special planned, if I get my way. I've been developing ideas over Christmas and it's really going to be something special. This is the thing, it's not just about the backflips. This is special and something you wouldn't expect," he said.
The popstar also played down reports that he is planning his own tattoo business, joking: "I don't think my mum's very happy about that rumour."
Got to Dance airs on Sky1 this Sunday (February 3) at 6pm, when the Top 30 acts will be revealed.