Australia Women took a two-point lead in the Ashes Series after a middle-order collapse condemned England to defeat in the first NatWest Series ODI at Lord's.
Chasing 204 for victory, England were progressing nicely at 142/3 in the 38th over when the loss of their captain Charlotte Edwards for 61 sparked a spectacular collapse to 176 all out.
England had looked comfortable in the early stages of their chase, as Edwards and Arran Brindle (21) put on 63 for the first wicket, then number three Sarah Taylor looked in fine form to make a brisk 22.
But she and Lydia Greenway fell quickly to Jess Jonassen - who finished with magnificent figures of 4/39 - as the match turned in Australia's favour.
And when Edwards edged a cut through to wicket-keeper Jodie Fields off spinner Erin Osborne (3/39) the match had swung completely; with the bowlers turning the screw brilliantly and England's lower order unable to find the fence as the required rate increased.
Australia had earlier forced their way to a competitive 203. Opener Meg Lanning was the standout performer, making a brilliant 56 in 64 balls - featuring eight fours - after her side had fallen to 24/2 in the early encounters.
Katherine Brunt was the standout performer in a largely disciplined performance by England's bowlers, finishing with 3/29.