The Tujia people of China prepare for a wedding 30 days before the wedding day by crying. The bride spends an hour a day crying. 10 days later, she is joined by her mother, and then ten days after that, her grandmother, and this continues until all the females in the family are crying daily for an hour. Thankfully it is not an act of sadness but this is actually meant as an expression of joy and deep love. Because the women all weep in different tones the collected noise sounds almost like a song.
Source and photo credit: http://www.wonderslist.com