Lilly, don't be silly :) FYI, thats an original Bollywood line by the great "Loin" Ajit...
Anyways, I dont think Pak singers can sing like Bollywood singers because traditional Bollywood singing is melody based where a singer needs to be "sureela". Sirf shor machana hi singing nahin hoti ;)
The void that Pak singers/bands fill in Bollywood is the niche of rock/sufi/sufi-rock/qawwali which traditional Bollywood singers do not sing. Singers like Rahat Fateh Ali Khan & Shafqat are great at what they do, but can they sing a Kishore Kumar song ?
I am yet to see a Pakistani or any other singer even come close to the caliber of a Kishore Kumar, Lata, Asha or Mohd. Rafi.
Who is great Lion Ajit... ?