(digitalspy.co.uk) - Amy Winehouse lashed out at a fan outside her London home on Saturday night.A man who took pictures of Winehouse as she tried to gain access to her property was the latest follower to bear the brunt of her fury. Reports suggest that she accused the fan of pinching her bum before attacking him.Winehouse's security guards, who are currently keeping watch over the singer at all times, stepped in quickly and broke things up. It is believed that the man laughed off the incident.The latest altercation came just one week after Amy made headlines for scuffling with a crowd member at the Glastonbury festival.