Last night's 12th Music of Black Origin (MOBO) awards, which took place at London's O2 Arena, was filled with a number of twists including a winner's diatribe against urban-music lyrics and a surprise appearance by Amy Winehouse.

Winehouse turned up to collect her award for the best U.K. female, and then performed two songs, "Me & Mr. Jones" and "Tears Dry On Their Own."

Kanye West (Roc-a-Fella) nabbed two of his three nominations with best video and best hip-hop. Dizzee Rascal (XL Records), the popular U.K. urban artist, walked away with the award for the best U.K. male and Rihanna (Def Jam) picked up the gong for the best international act.

From Boyhood to Manhood Foundation won the event's BeMOBO humanitarian award for its work in rehabilitating the disenfranchised young. The organization's director, Decima Francis, unleashed a heartfelt but uncompromising attack against urban-music lyrics that disrespected people, especially women.

Several of the U.K.'s young people, from 11 to 16 years old, have been fatally wounded in recent knife and gun crimes.

Francis said questionable rap and hip-hop lyrics could be blamed for an urban music culture that appears to disregard the value of human life. "How dare you; how dare you; how dare you," she cried out to rapturous applause. "You have no right to write the kind of music that makes people around the world feel they're entitled to call a 53-year-old woman like me a 'ho' or a 'bitch'."

In contrast, maverick movie director Quentin Tarantino made some jokes at the expense of U.K. Prime Minister Gordon Brown earlier on.

Tarantino compared Gordon Brown, who as the former Chancellor of the Exchequer was responsible for the country's economy, with Mr. Brown, one of the characters in his seminal crime flick "Reservoir Dogs."

Addressing the audience, Tarantino quipped about Prime Minister Brown, who is not known for his sartorial elegance. "My guy dealt with money; your guy dealt with money; my guy looked good in a suit." Then, after hesitating, he added: "Your guy dealt with money."

Other award winners included Ne-Yo (best song and best R&B); urban trio N Dubz (best U.K. newcomer); Sean Kingston (best reggae); G-Force (best gospel); Tim Westwood (best DJ); Soweto Kinch (best jazz); and 2face Idibia (best African act).