While it subsequently removed the tweet, you can still see the original text because so many people retweeted it.
We're hoping for an update from What's Trending explaining what gives.
Update: What's Trending just updated to say its tweet was "unconfirmed."
Update 2: Shira Lazar just posted an apology.
Update 3: Trying to distance themselves from the gaffe, an embarrassed CBS has cut all ties with Shira Lazar and What's Trending.