Lavanya shows off her mehandi during the Nagavalli function - I picked this up from a nice website and found what Nagavalli is exactly - here it goes "The evening of the marriage day is the time to relax and play. The newly wed wife calls her husband for play, inviting him through a song. Much to the merriment of one and all gathered, there follows list of playful items: the bride anointing the groom�s feet with colour paste ; fanning him, showing him a mirror; breaking papads over each other�s head; wrenching the betel pack from each other�s hand; rolling the coconut from one to another as in ball-play; and so on. During these items, the ladies sing songs poking fun at the bride, groom and the in-laws."