Mark Ronson was left upset after Amy Winehouse drank too much before joining him on stage at a gig in London, it's been reported.

Appearing as a surprise guest, the singer forgot many of the words to the pair's 2007 cover of The Zutons hit 'Valerie'.

Ronson, who produced the singer's 2006 album 'Back To Black', is said to have exchanged words with Winehouse after the show at the 100 Club.

"After the gig Mark was furious with Amy for getting smashed and they exchanged words,” a source told The Sun.

"He was annoyed that Amy got drunk when she knew she was going on stage. It was an important gig for him and he wanted things to be righ

"He felt let down by her - not for the first time."

As previously reported, Winehouse and Ronson recently recorded a cover of Lesley Gore's hit 'It's My Party'.

The track will appear on a upcoming compilation organised by Quincy Jones.

(by Jason Gregory)