Girls' Generation appeared on MBC's 'Radio Star' on March 12 and answered some questions very honestly.

The MCs asked, "Who's number one in terms of weight?"  The girls replied, "We're all similar."

Kyuhyun asked, "Wouldn't it be Sooyoung because of her height?" But the girls said, "Sooyoung is so skinny."

SEE ALSO: Daniel Radcliffe chooses Tiffany as the prettiest Girls' Generation member

Tiffany spoke up, "I weigh the most at 48 kg (~ 106 lbs).  These days, Sunny teases me, saying, 'This pig,'" making everyone laugh.  However, Tiffany proved she was as attractive as ever by revealing that Daniel Radcliffe of the famous 'Harry Potter' movies had a good impression of her.

She said, "One time, Daniel Radcliffe was asked to choose the prettiest Girls' Generation member and I proved to have left a good impression as he said I was the prettiest among the members."