Advertising Age teamed up with social-media trend-analytics service What the Trend to create the weekly Top 10 Most Tweeted Brands list. How does it work? From the Notes section at the bottom of the AdAge.com post: We broadly define "brands" to include major marketers (e.g., Apple) and branded products (e.g., iPad), as well as celebrity and entertainment brands (e.g., Lady Gaga , American Idol ). Ad Age works with WTT to consolidate multiple threads of brand chatter (e.g., Apple, iPad, iTampon, Apple Tablet) into one position on the chart when it's clear that related Twitter conversations are basically all about the same topic, even if they use different keywords. This week's top 10: 1: Oscars (including Sandra Bullock , Kathryn Bigelow , The Hurt Locker , Avatar , James Cameron , Academy Awards, Kathy Ireland , Red Carpet, Precious , Crazy Heart , Tyler Perry , Best Picture, Jeff Bridges , District 9 , Molly Ringwald , Zac Efron , SJP, Be...