Dong Shi Xiao Pin
During the Spring and Autumn period, there was a beautiful girl who lived in the country of Yue. Her name was Xi Shi, one of the 4 beauties in Chinese history. She was so freakin' beautiful that everything she did was perceived to be beautiful. Even when she winces from her chest pain she looked gorgeous...painfully gorgeous. Because everyone in the village loved her so much, whenever she was in pain and grabbed her chest, people thought it was rather adorable.
A few houses away, there lived her girl named Dong Shi. She was on the entire opposite spectrum as Xi Shi. Dong Shi was not very beautiful to begin with, but was someone who kept trying to improve her outer beauty. One day, Dong Shi saw Xi Shi grab her chest on the street, and assumed that it was something "beautiful" people do. So, Dong Shi began to grab her chest for no reason at all. Instead of people perceiving Dong Shi as beautiful, people only saw her as crazy. Whenever they saw Dong Shi running around the street, they'd run inside their homes and shut the front door.
MORAL OF THE IDIOM: Improper imitation CAN have the reverse effect than what you're trying to achieve