updated 04/19/2010 AT 1:00 PM ET
•originally published 04/19/2010 AT 1:25 PM ET
They were divorced less than a year ago, but it appears Amy Winehouse and Blake Fielder-Civil are ready to make a new start.
The Grammy-winning singer, 26, celebrated her ex-husband’s 28th birthday this weekend with a visit to the Jazz After Dark bar in London. The club’s owner, Sam Shaker, tells PEOPLE that the couple are still enamored with one another.
“They are in love with each other,” Shaker says. “If people would not interfere with all their life, they are amazing together They are happy together, and that’s all that matters to me.”