ABBA's Agnetha Faltskog feels sorry for current pop stars.

The Swedish singer - who was one of the hugest stars of the 70s with her group, before returning to her solo career when they split in 1982 - thinks the modern music industry it a tough place for young stars such as Britney Spears, who had a meltdown in 2007 and Amy Winehouse, who tragically passed away from accidental alcohol poisoning in 2011.

Speaking of Britney, she said: "It must be hard for people like her, to get into it and just be so young. Amy Winehouse, it's just so tragic. Her voice was amazing."

Agnetha, 63, shared lead vocals in ABBA with Anni-Frid Lyngstad, and admits that helped take away some of the pressure to perform every night.

She told Attitude magazine: "If Frida felt down or tired, I'd say, 'oh, I shall work for two,' and she would do the same for me. I often had problems with my throat when I had my tonsils removed, sometimes we had to work when we had a fever. So we relied on each other. It must be so hard for solo artists. You can never be ill. It was scary. I was always scared of getting ill, and sometimes you just did. But you knew you just had to work anyway."