Michelle Obama has a healthy-eating agenda, and is behind the White House's Let's Move anti-childhood obesity programme.

So we hope that goes some way to explaining this:

The US first lady was holding a Q&A on Twitter when a Barack Obama impersonator asked her how many calories she burns when she 'turns it up'.

Naturally she responded by holding a turnip and bobbing her head to the tune of Turn Down For What, which is also somehow still a voter-registration anthem.

Mrs Obama's direct UK equivalent is technically the Duke of Edinburgh, but her closest real counterpart is Samantha Cameron, prime minister David's wife.

Just imagine if either of them had attempted to dance with a turnip...

More: [Meet the first child in the UK with a 3D-printed prosthetic arm]1

More: [Jennifer Lawrence has this to say about people who looked at those photos]2