Singer now aiming to return to the stage at her headline show in LA on October 27
Cat Power and The Low Anthem will also perform at charity show marking 10 years since singer-songwriter's suicide
Singer opens up about recent incident, which saw her charged with possession of ecstasy and resisting arrest
Couple discovered to be in possession of heroin and ecstasy after being pulled over by police
Long-awaited album was thought to have been delayed until 2014
Singer tweeted that she'd finished the album back in April