Amy Winehouse made a surprise appearance alongside Mark Ronson as he debuted his new album in London last night (July 6).

The pair performed their 2007 cover of the The Zutons hit 'Valerie' but reportedly forgot the words.

Winehouse also looked upset when she tried to instigate the crowd to chant Ronson's name but they refused, according to BBC Newsbeat.

The singer was later photographed leaving the gig at the 100 Club to head to other neaby nightspots.

The concert marked the first time Ronson had performed with his new band The Business International in London.

The producer is set to release his new album 'Record Collection' in September.

(by Jason Gregory)