Miley Cyrus and Drake Bell reigned supreme at the 21st Annual Nickelodeon Kids Choice Awards in Los Angeles on Saturday (29Mar08), scooping two prizes apiece. Hannah Montana star Cyrus, 15, took the favourite TV actress and favourite female singer gongs on a night that saw Harrison Ford, Cameron Diaz and Orlando Bloom drenched in green slime - as part of the ceremony's traditional ritual. Heartthrob Bell picked up two prizes - favourite TV actor and favourite TV show for his sitcom Drake And Josh - at the Pauley Pavilion event, which was hosted by funnyman Jack Black. One of the biggest prizes of the night, the 'Wannabe' award for a celebrity who acts as a good role model for children, went to actress Cameron Diaz. She used the honour to promote environmental issues, telling the young audience, "You're going to change the world. Every one of you kids is the future - go out and make the world a better place." Prior to the event, rumours began to surface that Britney Spears was lining up a surprise appearance at the ceremony. However, the rumours failed to materialise. Other big awards went to Johnny Depp, for favourite movie actor; Jessica Alba, for favourite movie actress; Chris Brown, for favourite male singer; and the Jonas Brothers, for favourite group. American Idol scooped the favourite reality show gong; the Harry Potter series was named the favourite book winner, and Alvin And The Chipmunks won favourite movie. However, the night was more about the anarchic fun on offer. As well as a goo-covered Ford, Diaz and Bloom, R+B star Akon crashed a vehicle into a slime container, and Usher fired the sticky solution at a sumo wrestler from a cannon. Meanwhile, supermodel Heidi Klum was in the thick of the action, flying from the roof on a bungee cord and popping balloons en route to ground level. Jack Black told the crowd over 88 million votes had been registered for the 2008 ceremony - more than twice last year's (07) record-breaking 40 million. The night ended with Black and Bloom swinging in mid-air and being drenched in what the School Of Rock star claimed was "27 million gallons" of green slime. The main list of winners is as follows: TV show - Drake and Josh Reality show - American Idol TV actor - Drake Bell TV actress - Miley Cyrus Movie actor - Johnny Depp Movie actress - Jessica Alba Female singer - Miley Cyrus Male singer - Chris Brown Group - The Jonas Brothers Book - Harry Potter series Movie - Alvin and the Chipmunks Voice from an animated movie - Eddie Murphy, for Shrek the Third.