IU became Thumbelina next to famous health trainer�Sean Lee.

On the 23rd, Sean Lee tweeted, "A picture with nation's little sister today! ^^ I look really big, Keke," and shared the above picture.

The two seemed to have met in the waiting room of MBC's 'Quiz to Change the World'. IU emphasized her slim figure with pink skinny jeans and a t-shirt, while Sean Lee showed off his giant muscles with a sleeveless top. Sean looked like he could cover two IUs with his big figure.

Netizens commented, "Next to Sean Lee, I would look skinny too," and "IU's thighs are thinner than Sean Lee's arms."

Source+Picture: Sean Lee's Twitter