R&B star Kelis was an hour late for her show in London on Wednesday night (02Jul14) after she was locked out of her house.

The singer was due to perform at the Kopparberg Urban Forest launch party in Dalston, east London, but left the crowd waiting for an hour following a drama at home.

Kelis is said to have rented a property in Britain while she performs around Europe this summer (14), but trouble with keys left her locked outside in the run-up to the show.

A source tells Wenn, "Kelis turned up an hour late to her headline performance at the Kopparberg Urban Forest after locking herself out of the house. However, she won over the crowd with a medley of her famous hits including Milkshake and Acapella."

The London show came just days after Kelis performed at Britain's iconic Glastonbury Festival.