Reclusive former Abba star Agnetha Faltskog has launched a new website and Twitter account to coincide with the release of her first album in a decade.

The Dancing Queen singer unveiled her new track, When You Really Loved Someone, and the accompanying video on her new website on Monday (11Mar13).

The track comes from Grammy-nominated songwriter/producer Jorgen Elofsson, who has penned hits for Britney Spears, Kelly Clarkson and Celine Dion, among others.

Faltskog's new album will be released in May (13).