Guru Randhawa is an Indian singer and songwriter from Punjab, India. Randhawa is known for his tracks like "High Rated Gabru", "Patola", "Raat kamal hai" and "Lahore". He sang in the 2017 Indian Premier League opening ceremony. He made his Bollywood singing debut in Hindi Medium. He also sang for the film Simran. He composed and sang for films like Hindi Medium, Tumhari Sulu, Dil Juunglee, Sonu Ke Titu Ki Sweety and Blackmail. He is related to singer Zora Randhawa.

Answer this question: who is the singer of high rated gabru? Let's give stream of consciousness first:
The relevant information is: Randhawa is known for his tracks like "High Rated Gabru", "Patola", "Raat kamal hai" and "Lahore".
So, the final answer is Guru Randhawa.