Abba don't fight - Abba

The perpetual myth that Abba - especially the women - fought like a stoats in a stovepipe hat refuses to die; Agnetha and Anni-Frid have had another go at killing it off:

"A lot has been written about how Agnetha and I fought and quarreled with each other. There is absolutely no truth in that," Lyngstad was quoted as saying by tabloid Aftonbladet. "Of course we competed, but to good effect."
[...]
"No, we didn't fight. But we have to live [with] a whole lot of such misinterpretations," Faltskog said.

The pair were accepting a lifetime achievement award; it's probably they used the prize as some sort of weapon to hit each other with as soon as nobody was looking.