No ring: Cheryl heads out for a spot of exercise in LA yesterday afternoon

Stressed: the singer was also spotted smoking during her outing

Mingling: Cheryl - again without her wedding ring - mixes with fellow guests at a club in LA on Saturday

Glamorous: Cheryl showed Ashley what he's missing with a figure-hugging strapless dress

Girls night out: A happier Cheryl greets bandmates Nicola and Kimberley in LA