The Aegis-owned agency also took home the grand prix and the award for Media Idea (Niche) for its teenage road safety campaign for the Department of Transport.
Among the other big winners on the night were Channel 4, which was crowned Sales Team of the Year, and OMD UK, whose campaign for Sony Bravia was named Best Media Idea (Large).
The event, hosted by comedian and presenter Julian Clary, attracted around 1,500 media professionals.
The winners in full:
Grand Prix: Carat
±±¾©Èü³µpk10: Department for Transport - Talking teens' language
Media Agency of the Year: Carat
Sales Team of the Year: Channel 4
Media Idea (Large): OMD UK
±±¾©Èü³µpk10: Sony Bravia
Media Idea (Medium): ZenithOptimedia
±±¾©Èü³µpk10: Premier Foods (Branston)
Media Idea (Niche): Carat
±±¾©Èü³µpk10: Department for Transport - Talking teens' language
Media Brand of the Year: Emap's Grazia
Sales Pitch (Large) - Silver: Viacom Outdoor
Pitch: London Underground: Copywriting goes Underground
Sales Pitch (Medium): IPC Advertising
Pitch: McDonalds - Take another look
Sales Pitch (Niche): Turner Broadcasting
Pitch: Yoplait Dairy Crest - Frubes Freezing Fridays
Collaboration: ZenithOptimedia/The Sun/Mediacom/TalkSport
±±¾©Èü³µpk10: Mars Believe
Media Innovation: Mediacom
±±¾©Èü³µpk10: Met Police (Knife City)
Best Research: Guardian Newspapers Ltd's Impact Research