Wino Spares Audience

Walks Outta Gig

5/11/2009 5:50 PM PDT BY TMZ STAFF
Amy Winehouse bailed on the St. Lucia Jazz Festival this weekend -- midway through a song!

Amy Winehouse: Click to watch
Amy was attempting to perform "Valerie" when suddenly she stopped singing, stared at the ground for 30 seconds and walked off stage -- leaving her backup singers looking as confused as she does on a regular basis.

Her reps blamed the rain, citing "technical difficulties."