British singer Amy Winehouse has prompted rumours she is engaged to on-off boyfriend Blake Fielder-Civil, after being spotted flashing a ring on her engagement finger. The chart sensation revealed the clue after being forced to change for a gig in north London at a local pub, after she was locked out of her home nearby. A source reveals, "She realised she had lost her keys, but thought she could rock up at the venue with no problems. But when her people carrier arrived there, she was greeted by a massive crowd." Winehouse was rescued by the landlord of a nearby pub, who let her change in his flat before she emerged for the gig at the Dublin Castle in Camden - part of the Camden Crawl festival - showing off the huge diamond ring.