Our Twitter Week in Review chart uses data collected and parsed for Ad Age by the What the Trend (WTT) unit of HootSuite, the social-media management dashboard with more than 4 million users. (Last week's chart is right over here.) We're back today with Volume 26. Scroll down below the infographic for some context -- and watch for a fresh edition of our Twitter Week in Review each Friday.
- Justin Bieber's fans rallied this week around one of the most famous among them with a tribute that dominated the social conversation. Around Valentine's Day, the pop singer met and bonded with 6-year-old Avalanna Routh, who had been hospitalized for treatment of an aggressive form of brain cancer. Earlier, nurses had arranged a mock wedding for Avalanna and a cardboard cutout of her teen idol. Bieber tweeted about Avalanna often and visited her again in the summer while touring to promote his most recent album. After Avalanna died on Wednesday, fans retweeted Bieber's RIP message more than 200,000 times.
- Google Maps had a week of great press -- and not just because its maps app was constantly being favorably compared with the Apple Maps app that replaced it on iPhones. (Apple apologized today and suggested people use rival services from companies such as Google.) This week Google, in partnership with the Caitlin Seaview Survey, also unveiled underwater panoramas of sections of Australia's Great Barrier Reef, Hawaii and the Philippines -- essentially an "underwater street view." It's the kind of stuff that always generates great buzz for Google; though it has little practical application, this digital excursion underwater was very well-received by tech bloggers and twitterers.
- Apple Maps aside, the release of the new iPhone is still a white-hot topic on Twitter, as preorders for the device are being filled in waves and Apple stores buckle under demand that outstrips supply. This means that for the second week in a row, AT&T has trended high as the preeminent iPhone carrier.
- For explanations of trends and memes not covered above, visit HootSuite's What the Trend.
Help HootSuite's What the Trend define trends by following WTT: Define Now (@whatthetrend). And stay up to date on the latest HootSuite product-update details and company news by following @hootsuite.