Singer Amy Winehouse was an hour late to her first post-rehab concert Friday night, E! News Online reports.

The Grammy-winning soul chanteuse performed at the sold-out Rock in Rio music festival in Lisbon, Portugal.

Winehouse’s voice cracked throughout her performance. She had visible cuts on her left arm and a bandage on her right hand. The trouble-prone diva is famous for her tardiness, show cancellations, offstage antics and rehab stints. Just last week, her father accepted a prestigious British award on her behalf because she was late to the ceremony.