Agnetha Fältskog is no stranger to the charts. As one quarter of supergroup ABBA, she conquered them effortlessly for a glorious decade back in the 1970s.

But "the blonde one" is almost as famous for her withdrawal from public life, following her divorce from songwriter/guitarist Bjorn Ulvaeus and the band's eventual split.

agnetha faltskog
It's like she's never been away...

Despite several forays into the pop world, either as a solo artist or on duets with the likes of Peter Cetera, such strange anecdotes as her being romanced by a Dutchman who later became obsessed by her have all contributed to her Garbo-esque myth - the vision of her beautiful but alone on a Swedish island, staring forlornly into camera, singing in perfect English but with the hint of an accent, and occasionally closing her blue-covered eyelids in despair is a seductive one.

It is one the Swedish singer refutes, however, telling the BBC earlier this week: "I have been described as a very mysterious human being and that hurts a little bit, because it's not like that at all."

Loading Slideshow...
  • Abba, the top-selling Swedish group

    Abba, the top-selling Swedish group, on stage at Wembley Arena during their concerts which mark the group's first appearance in Britain for three years.

  • Anna and Frida perform "Waterloo" in rehearsals

    Anna and Frida of the Abba group singing Sweden's entry, "Waterloo", during a dress rehearsal in Brighton for the Eurovision Song contest.

  • ABBA Royal Albert Hall

    Agnetha Faltskog (left), Bjorn Ulvaeus and Annifrid Lyngstad during the concert by Swedish pop group ABBA at the Royal Albert Hall.

  • ABBA disc

    A trophy presented to ABBA for celebrating worldwide sales of over 360,000,000 on the stage to celebrates 5th year anniversary of West End Musical Mamma Mia at the Prince Edward Theatre in central London.

  • ABBA

    17th NOVEMBER : On this day in 1974 pop group ABBA begun their first tour of Europe. The four members of Swedish pop group "Abba" . From left to right: Benny Anderson, Anni-Fryd Lyngstad, Anna Falkstog and Bjorn Ulvaeus on their way to a press conference at Crockford's Club in London Carlton House Terrace. *The group were in Britain to attend the premiere of their first film, ABBA - The Movie, at the Warner West End 2 Cinema in Leicester Square. Much of the film is about their Australian tour.

  • ABBA : 1974

    1/4/74 : SWEDISH POP GROUP "ABBA" IN LONDON FOR A PHOTOCALL TO PROMOTE THEIR SONG "WATERLOO" WHICH THEY WILL ENTER INTO THE EUROVISON SONG CONTEST IN BRIGHTON. FROM LEFT TO RIGHT: BENNY ANDERSSON, FRIDA LYNGSTAD, ANNA FALTSKOG AND BJORG ULVAEUS

  • Abba congratulate each other

    The pop group Abba congratulate each other in Brighton, after winning the Eurovision Song Contest for Sweden with "Waterloo", sung by the girls, Annifrid Lyngstad (Frida), second left, and Agnetha Faltskog (Anna). The other group members, Benny Andersson, left, and Bjorn Ulvaeus, composed the song.

  • Swedish pop group Abba

    Swedish pop group Abba meet a mounted policeman as they relax in Brighton, after their victory in the Eurovision Song Contest. From left: Agnetha Faltskog (Anna), Bjorn Ulvaeus, Benny Andersson and Annifrid Lyngstad (Frida). The men composed the winning song, "Waterloo", which was sung by the girls.

  • Abba - Heathrow Airport - London

    Swedish pop group ABBA (from left) Benny Andersson, Annifrid Lyngatad, Agnetha Faltskog and Bjorn Ulvaeus at Heathrow Airport.

  • Music - Eurovision Song Contest 1974 - Brighton

    SWEDISH POP GROUP "ABBA" AT THE EUROVISION SONG CONTEST IN BRIGHTON IN WHICH THEY WON WITH THEIR SONG "WATERLOO". FROM LEFT TO RIGHT: BJORN ULVAEUS, AGNETHA FALKSTOG, ANNIFRID LYNGSTAD AND BENNY ANDERSSON

  • Abba

    Swedish pop group, ABBA. (l-r) Annfrid, Benny (front) Bjorn (back) and Agnetha.

  • Abba

    ABBA's Anna, Bjorn, Frida, and Benny after they won the Eurovision Song Contest with "Waterloo".

  • ABBA & Princess Margaret

    Princess Margaret with four members of the Swedish pop group "Abba" afther she had presented them with the Carl-Alan group Award for 1977 at the Lyceum Ballroom in London. (l-r) Anni-Fryd Lyngstad, Benny Anderson, Bjorn Ulvaeus and Anna Falkstog.

  • Music - ABBA - European & Australian Tour - Gothenburg, Sweden

    ABBA perform on stage in Sweden. (l-r) Bjorn Ulvaeus, Anni-Fryd Lyngstad and Agnetha Faltskog

  • Music - ABBA - European & Australian Tour - Gothenburg, Sweden

    ABBA wish their fans goodnight after performing in Sweden. (l-r) Bjorn Ulvaeus, Agnetha Faltskog, Anni-Fryd Lyngstad and Benny Anderson

  • Music - ABBA - Royal Albert Hall, London

    Bjorn Ulvaeus, Agnetha Faltskog, and Frida Lyngstad, right, from Swedish pop group ABBA on stage at the Wembley Arena, London.

  • Music - ABBA - Wembley Arena, London

    Agnetha Faltskog, left, and Frida Lyngstad, female members of Swedish pop group ABBA on stage at the Wembley Arena, London.

  • Music - ABBA - Wembley Arena, London

    Bjorn Ulvaeus, from Swedish pop group ABBA on stage at the Wembley Arena, London.

  • Music - ABBA - Wembley Arena, London

    Agnetha Faltskog, from Swedish pop group ABBA on stage at the Wembley Arena, London.

  • Music - ABBA - European & Australian Tour - Gothenburg, Sweden

    ABBA perform on stage in Sweden. (l-r) Agnetha Faltskog and Anni-Frid Lyngstad

However, that could all be about to change, with her first solo album in nine years set for release in a couple of months. And who better to lead her back to centre-stage than the UK's resident crowd pleaser, Mr Gary Barlow? Barlow has shared vocal duties on a song, 'I Should Have Followed You Home', from her forthcoming solo album, 'A'.

And this morning, Agnetha debuted the first single from the album, 'When You Really Loved Someone', a track which was her solo songwriting contribution to the album.

Have a listen above and decide - has she still got it? Let us know.

Judging by first listen, this pleasing key-changer could have been a convincing entry for this year's Eurovision Song Contest, an event Agnetha knows how to win (1974, 'Waterloo' - what else?) even if she might have had to perform in slightly lower heels this time around.

Instead, that honour's going to Bonnie Tyler with 'Believe in Me', while Agnetha sets herself for the release of a forthcoming solo album 'A', due for release on 13 May 2013, with the single above available for download now.

And, here's Bonnie's entry, just to keep you in the mood for a power ballad come 18 May (Eurovision final day)...