Anastacia has reportedly been arguing with her 'Strictly Come Dancing' professional Brendan Cole over his lack of patience.
The talented ballroom and latin groover is known for taking his frustration out of his celebrity partners if they fail to pick up his routines quick enough, but it seems the 'I'm Outta Love' hitmaker - who recently ripped a muscle in her chest - isn't taking his outbursts lightly and is giving as good as she gets.
A source told The Sun newspaper: "Brendan is not the most patient of dancers. They've had to tweak all their dance moves because of her injuries - they can't even do any lifts or sudden turns. His previous partners [in previous years] like Natasha Kaplinsky, Lulu, Kirsty Gallacher have dealt with his outbursts but Anastacia doesn't take any crap and fights back."
However, despite their backstage squabbles, the pair are determined to put their differences aside in order to put on a beautiful display at the weekend and climb up the leaderboard.
The insider explained: "But both are determined to make their relationship work on the dance floor and move up that table."
The 48-year-old singer - who has had a double mastectomy - managed to scrape through to the next round in the first week of eliminations after she was banned from taking part in the dance off against Melvin Odoom due to her painful injuries.
And, although her pain mean she's had to change some of the moves in her routines, Anastacia doesn't want the judges to be lenient on her when she does her live performance.
She said recently: "The next dance, they're making this arm be more of the Rumba and this arm is doing side stuff.
"They [the judges] do understand that I may not be able to do a lot of lifts but lifts aren't mandatory in any dance. They're allowed in three of the dances in the show. In order to stay, I want to feel like I can compete on a level that everyone else is."