Women’s singing and dancing at celebrations

The honorable Shaykh! Some women dance and sing at celebrations. Is this action permissible or not?
What I see is that women should be prevented from dancing; because that involves fitnah (trial, discord or temptation). I used to be lenient in this matter, but incidents were reported to me that necessitate my saying that dancing at parties should be prohibited. Striking the duff (the hand drum) with decent, good, and pure singing is sufficient, because that is from the Sunnah (the Prophet's way).