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WASHINGTON (AP) - Trying to find Michelle Obama on Twitter? Try tweeting her at @FLOTUS, which is Washington shorthand for "First Lady of the United States."

Mrs. Obama's office unveiled her new Twitter identity on Thursday, largely to replace a previous Twitter account under the handle of @MichelleObama. That account was launched a year ago and run by President Barack Obama's re-election team. It will now be managed by the Democratic National Committee.

The site's initial tweet promised updates and pictures. Tweets by the first lady herself will be signed "-mo."

Followers also were asked to re-tweet that initial message to wish Mrs. Obama a happy birthday. She turned 49 on Thursday.