Michelle Obama uses a turnip to respond to Vine star...

Michelle Obama uses a turnip to respond to Vine star on Oct. 14, 2014.

First lady of the United States by day – social media star by night?

Michelle Obama shocked the Internet with her response to a popular Vine personality Tuesday night.

Iman Crosson, known as “Alphacat” on Vine, participated in the first lady’s Vine Q&A for the Let’s Move initiative by asking a simple, yet difficult question.

“A question for Michelle Obama: How many calories do you burn every time you 'turn up'?! #AskTheFirstLady #LetsMove,” Crosson shared a video with his nearly 3 million followers.

Crosson, who gained popularity on Vine by impersonating President Barack Obama, didn’t expect to get an answer.

But the first lady was happy to oblige.

“Hey, Alphacat. The First Lady wants to know…#TurnipForWhat? #AskTheFirstLady #TD4W,” The White House posted a video of Obama in response.

Obama held up a turnip while dancing to DJ Snake and Lil Jon’s hit song “Turn Down for What." 

As of Wednesday morning, the Vine was shared more than 30,000 times and received nearly 45,000 likes.

It wasn’t long until Obama’s hashtag #TurnipForWhat became a trending topic on Twitter.

“Mrs. Obama responded to my Vine lol,” Crosson posted on Twitter shortly after Obama posted the 6-second clip.

We're as shocked as you are, Internet.

(Mobile users: Watch the video by clicking on the link above).

Alphacat's question:

The first lady's response:

A Newsday review turned up half a dozen instances of unidentified remains found on LI in the early '90s — a period when the admitted serial killer began committing murders. NewsdayTV’s Shari Einhorn hosts a discussion with Suffolk County District Attorney Ray Tierney and Newsday criminal justice reporter Anthony DeStefano.  Credit: Newsday Studios; News12/ Pool. Photo Credit: Newsday/ James Carbone; Suffolk County District Attorney; North Shore High School

'We treat each of these cases individually' A Newsday review turned up half a dozen instances of unidentified remains found on LI in the early '90s — a period when the admitted serial killer began committing murders. NewsdayTV's Shari Einhorn hosts a discussion with Suffolk County District Attorney Ray Tierney and Newsday criminal justice reporter Anthony DeStefano.

A Newsday review turned up half a dozen instances of unidentified remains found on LI in the early '90s — a period when the admitted serial killer began committing murders. NewsdayTV’s Shari Einhorn hosts a discussion with Suffolk County District Attorney Ray Tierney and Newsday criminal justice reporter Anthony DeStefano.  Credit: Newsday Studios; News12/ Pool. Photo Credit: Newsday/ James Carbone; Suffolk County District Attorney; North Shore High School

'We treat each of these cases individually' A Newsday review turned up half a dozen instances of unidentified remains found on LI in the early '90s — a period when the admitted serial killer began committing murders. NewsdayTV's Shari Einhorn hosts a discussion with Suffolk County District Attorney Ray Tierney and Newsday criminal justice reporter Anthony DeStefano.

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