Music and mehndi play a significant role in Indian weddings. There is a apecial night dedicated for Henna, music, singing and dancing, called "Sangeet Night" or "Mehndi night".
On the Sangeet night family member get together to have fun and frolic generally a day before wedding. Everyone shows their moves good or bad and have fun.
Selected family memeber (or hired professionals) apply henna to bride and on some religions to the groom too.
Umpteen number of Bollywood movies have scene related to Henna evetns and various melodies have been created dedicated to henna.
Here are some selected Mehndi Songs mostly in Hindi and Punjabi language.
You can request mehndi songs in the comment section below.