Abba singer Agnetha Faltskog insists the pop superstars were a poor live act, blighted by clumsy dancing and erratic vocals.

The Swedish sensations were one of the biggest bands in the world in their 1970s heyday and have sold more than 370 million records, but blonde Faltskog is adamant they were not an appealing group to see in concert.

She feels the dance moves she performed with fellow vocalist Anni-Frid Lyngstad were too uncoordinated and their singing often failed to live up to the sound of their records.

Faltskog tells British magazine You, "Performing live is not my favourite. I am more of a recording person; I prefer to be private... Walking on stage in concert and singing live, that is a bit difficult. And I don't think we sounded or looked very good... It was nice to look how we looked, but we had no professional dance help. We did it on feelings, so when we had our concerts it was different every night. Frida and I didn't talk beforehand about what we were going to do."