'Is diet cola a vegetable too?' Will Ferrell makes hilarious cameo in Michelle Obama's latest Let's Move PSA

Michelle Obama has enlisted Will Ferrell for her latest Let's Move PSA.
The hilarious short film, which made its debut on GMA this morning, takes the form of a focus group in which the First Lady and the comedian quiz kindergarteners on their favorite healthy foods.
But while Mrs Obama approaches the task in earnest, Mr Ferrell quickly has the youngsters in giggles.

Healthy sense of humor: A new Let's Move PSA starring Michelle Obama and Will Ferrell takes the form of a focus group in which the First Lady and the comedian quiz kindergarteners on their favorite healthy foods

'What if you guys, for your lunch at school, had a krill oil supplement sandwich,' Mr Ferrell suggests.

And when one little boy eagerly raises his hand to share his favorite vegetable, Mr Ferrell says: 'Let me guess - cabbage?'
Another kid lounges low in her chair as she volunteers 'bananas' as a favorite. When the camera turns back to Mr Ferrell, he is doing the same.
'I like to get relaxed too,' he answers.

Focus group: Mrs Obama and Mr Ferrell are joined by an adorable group of youngsters

Funny: The kids are tickled by the comedian's misguided ideas about healthy eating

Michelle Obama enlists Will Ferrell for hilarious Let's Move PSA

In an effort to offer his own suggestion, he then asks: 'Also is diet cola? Is that a vegetable?'
The children dissolve into giggles - but Mr Ferrell keeps a straight face, asking: 'What's so funny?'
To her credit, Mrs Obama manages to keep a straight face too - even when the comedian asks the children if there is 'one trick to having a great beach bod for the summer.'
Delivering the heart of the Let's Move message, she says: 'It's not about tricks. Getting a good body and staying healthy is about dedication and consistency and eating right.'

Taking it easy: One little girl lounges low in her chair as she volunteers 'bananas' as a favorite food...

...When the camera turns back to Mr Ferrell, he is doing the same. 'I like to get relaxed too,' he answers

This, Mr Ferrell learns, means he cannot eat a whole honey-glazed ham, nor can he eat healthy all week only to spend Sundays consuming nothing but candy.
'You might get sick,' one little girl tells him earnestly.
But it seems his comedic performance was not quite enough for this tough crowd.
When Mrs Obama quizzes the kids on their favorite comedians, not one mentions Mr Ferrell's name - despite some none-too-subtle hints.

Who is your favorite comedian? Mr Ferrell looks prematurely flattered as he anticipates the kids saying his name

Ahem! Mr Ferrell offers a less-than-subtle hint as the children reveal that Jimmy Fallon is their favorite funnyman

'Jimmy Fallon,' calls out one.
'Me too!' replies another.
Stung, Mr Ferrell tells Mrs Obama, 'You're lucky I didn't ask them who their favorite First Lady is.'

DM