In a bid to promote his health-care plan to young Americans, U.S. President Barack Obama appeared on "Between Two Ferns," a spoof online talk show hosted by comedian Zach Galifianakis.

Known for its awkward moments, the show has become an Internet cult favourite. Previous guests include award-winning actress Natalie Portman and pop sensation Justin Bieber.

Posted to the Funny or Die website on Tuesday, the six-minute Obama segment was probably unlike any interview a sitting U.S. president has had to experience.

"Sorry I had to cancel a few times. My mousepad broke last week and I had to get my great-aunt some diabetes shoes," Galifianakis tells a straight-faced Obama at the beginning of the show.

From there, the interview spirals into further awkwardness, with Galifianakis firing off a bunch of oddball questions.

Here are five brilliantly uncomfortable moments from the interview:

1. North Ikea???

Not shying away from the hard-hitting international diplomacy questions, Galifianakis asks Obama about Dennis Rodman's recent trip to North Korea.

"So how does it work? Do you send Ambassador Rodman to North Korea on your behalf?" Galifianakis asks. "I read somewhere that you’d be sending Hulk Hogan to Syria. Or is that a job more for Tanya Harding?"

Obama promptly corrects him, saying "he’s not our ambassador."

Galifianakis then attempts a follow-up question, asking the president what the U.S. should do about "North Ikea."

2. "Last black president"

Perhaps in an attempt to ask about the legacy Obama will be leaving behind when he exits the Oval Office, Galifianakis asks: "What does it feel like to be the last black president?"

"Seriously," replies Obama. "What’s it like for this to be the last time you ever talk to a president?"

3. "Hangover" zinger

Galifianakis wasn't the only one making comedic jabs during the interview. When asked about how he felt about not being able to run for a third term, Obama tells the actor: "If I ran a third time, it would sort of be like doing a third ‘Hangover’ movie. Didn’t really work out very well, did it?"

4. Bradley Cooper love

Obama continues on the comedic offensive, praising Galifianakis's "Hangover" co-star Bradley Cooper.

A pouty Galifianakis replies: "Tall, handsome -- that's easy. Be short, fat and smell like Doritos and try to make it to Hollywood."

5. Kenya and birth-certificate controversy

Galifianakis then takes back control of the interview, asking the president about his birth certificate and whether he plans on building his presidential library in his "home country of Kenya."

Obama retorts back, commenting that the question is "ridiculous" and asks the actor about his birth certificate.

Galifianakis replies that he doesn’t want to show anyone his birth certificate because he’s embarrassed by it. "My weight on it -- it says that I was born 7 lbs, 800 ounces."