Answer the following question: Read the following article and select the best answer. Article: Do you know who is the most popular star on the Internet now? Yes, he is "Brother Coat" Zhu Zhiwen! A few months ago, Zhu Zhiwen was an unknown farmer. A video of his show has been watched by more than millions of people,now his videos are the most popular. Zhu Zhiwen attracts Chinese netizens' hearts. And he is called "Brother Coat" by them. In March 2011, he took part in a program called "I'm a Big Star". He walked out onto the stage in a dark green coat. Then he began to sing the song of the TV drama Romance of Three Kingdoms. When the audiences heard rich and powerful voice,all of them stood up and cheered. After that, he became a well-known person. The judges asked him if he had any professional training. Zhu said no. "When he started, I thought someone played the original tape by mistake. But later on, I got it, " said one of them, "we can't _ ." At last, he won the first prize in the program of "I'm a Big Star". Zhu Zhiwen was born in a village of Shandong in 1969. He liked listening to the radio. When the music played, he sang it along. Every morning, he would get up early and practiced singing near a river. He keeps doing it for nearly 30 years. "When I'm working in the fields, "said Zhu Zhiwen, "I often sing for myself, some villagers even think me crazy,but I really love it. I'm not singing for money, I'm singing for ordinary people in China." Mrs. Sun, a 56-year-old engineer, one of his fans said, "I watched his videos without getting tired of it! It is so amazing, and every time I watch it, I am filled with excitement and his voice is perfect! I am crossing my fingers in hope that he has a bright future." Question: When did Zhu Zhiwen become a well-known person? - In 1969. - In 2011. - Two years ago. - A few years ago.
Answer:
In 2011.