Very famed South Korean pop song, sung by Park Jae-sang who`s stage name is PSY.
Gangnam style video has been viewed about 1 billion times on YouTube.
What - interrogatively; "What is your demand?".
Gulshan-E-Iqbal - very populated and famous area in Karachi.
Knock - rap with the knuckles; "Knock softly".
Park Towers - located on main Shahrah-e-Firdousi, Clifton Karachi.
Metaphor - a figure of speech in which an expression is used to refer to something that it does not literally denote in order to suggest a similarity; "He is a lion".
Shah Faisal Colony - Very populated area of Karachi near airport.