Any song is a good song at a wedding😅. Some of my picks are : Tamanche Pe Disco, Proper Patola, Nachde Ne Saare, Cutie Pie and many more. (Not gonna repeat the ones mentioned by others).
I really like Mehndi Hai Rachne Wali. Such a beautiful song. It brings colours and happiness and sorrow. Mixed emotions. But everybody will eventually love it.