Strictly Come Dancing's Danny Mac and Oti Mabuse wowed on last weekend's first live show of the series.
But that brilliant Cha Cha routine took a lot of effort, with Danny quipping that Oti was a "beast" in rehearsals.
Speaking on It Takes Two, Danny said of the pair's training: "There's been pinching, slapping, arguing, there's been all sorts.
"I adore her, she is fantastic... but she is a beast!"
Perhaps not the most pleasant of nick names, but Oti laughed it off and raved about Danny: "He works so hard in training and gives everything he can."
Danny also revealed how he was close to 'vomiting from nerves' backstage last Saturday night.
Chatting about his first dance, Danny told Zoe Ball on BBC Two: "I had the best time, it was sheer adrenaline. I have never been so nervous in my entire life. I was sick, I was almost vomiting from nerves.
"It was nuts, it was absolutely nuts."
This week Danny and Oti will be dancing the Viennese Waltz to 'Never Tear Us Apart' by INXS and have something "gritty" lined up.
Oti explained: "We have a really intense story that we kind of want to tell. It's usually such a romantic dance. We thought 'let's just twist things up."
"It's gritty, it's not a lovey dovey Viennese Waltz " added Danny.
Strictly Come Dancing 2016's live shows continue this Saturday at 6:20PM on BBC One.