Right on the money Pulsar. As I revisited it again, the entire song looks affected, with feigned emotions and few forced accent as you mentioned. But then perhaps Kishor Limboo could provide a little more insight on this, he recently wrote an interesting article about Hindi music's invasion in Nepalese culture, I'd like to listen more about Westernization of Nepalese music as well.

My take is simple, sing like an American when you sing a Pearl Jam number, but when singing in Nepali, kindly sing like Kumar Basnet, it depicts our tradition more effectively.