Amy Winehouses festival season got off to a bad start this weekend when she performed live at an event in Portugal. Despite drug and mental health problems Wino has a full schedule of festival appearances this summer- including gigs at Bestival, V Festival and Glastonbury. Amy made her live return on Saturday at a Lisbon show in front of 90,000 people but still turned up half an hour late. She also suffered from a weak voice through the set and swore several times while on stage. Wino even admitted at one point that she should have cancelled. Despite the problems the Back To Black singer managed to get through many of her hits.